8. The number is ---

A. 8
B. 6
C. 4
D. None of these

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Answer: Option C

Explanation:

প্রিমিয়াম প্ল্যান: ১ মাস

99 ৳

৩০ দিনের জন্য সকল লাইভ এবং আর্কাইভ মডেল টেস্ট, প্রশ্ন ব্যাংক ও লেকচার শিট সহ অ্যাপ এর প্রিমিয়াম সব এক্সেস পাবেন।

সাবস্ক্রিপশন লিংক

722 . A bus travelling at a speed of 5 km/hour, takes 3 hours to complete a distance. If it takes 4 hours to complete the same distance by your car, what is your speed ?

A. 24km/hour
B. 40km/hour
C. 3.75km/hour
D. none of these

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Answer: Option C

Explanation:

Speed 5km/hr

Time taken 3 hours

So, distance=5×3=15 km

So, my speed=15/4=3.75 km/hr

(ans)

723 . A business firm reduces the number of hours its employees work from 40 hours per week to 36 hours per week while continuing to pay the same amount of money. If an employee earned x taka per hour before the reduction in hours, how much does he earn hour under the new system?

A. 1/10
B. x/9
C. 9x/10
D. 10x/9

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Answer: Option D

Explanation:

In 1 hour it's x taka

So, in 40 hours it's 40x taka

So, earn per hour in new system=40x/36=10x/9

(ans)

724 . A businessman has 1000 kg of rice, part of which he sells at 8% profit and the rest at 18% profit. He gains 14% on the whole. How much Kg of rice did he sell at 18% profit?

A. 600
B. 620
C. 640
D. None

View Answer	Favorite Question

Answer: Option A

Explanation:

গ্যাস ট্রান্সমিশন কোম্পানি লিমিটেড | সহকারী ব্যবস্থাপক | ২০.০৪.২০১৮

A. 8
B. 6
C. 4
D. 10

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Answer: Option A

Explanation:

rehana took = 1/3 of 18 pieces = 6 pieces

ramaining = 12 pieces

rahim took 1/3 of 12 pieces = 4 pieces

total remaining = 12 - 4 = 8 pieces.

NRBC BANK PO/TAO (16-06-2023) || 2023

A. 8 : 10 a.m
B. 8 : 05 a.m
C. 8 : 15 a.m
D. 7 : 50 a.m

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Answer: Option B

Explanation:

Three quarters of an hour = 45 minutes

7:20 am + 45 minutes = 8:05 am

727 . A can complete a piece of work in 12 days, A, B and C can complete the work in 6 days, Efficiency of B is 0.5 times the efficiency of In how many days C can complete the works= alone?

A. 24 days
B. 10 days
C. 16 days
D. 12 days

View Answer	Favorite Question

Answer: Option A

Explanation:

Efficiency ratio of A:B = 1 : 3 = 2:1

So, days ratio A:B = 1:2

A needs 12 days, So B needs 12x2 = 24 days

C can do in 1 day = 1/6 - {(1/12) + (1/24)} = (1/6) - ((3/24) = (1/24) part

C can do 1/24 part in 1 day

" " " 1 " " 1X24 = 24 day.

Officer (General) |-Sonali | Janata | Bangladesh Krishi_Bangladesh Development bank ২৪.০৫.২০১৯

A. 16 days
B. 18 days
C. 23 days
D. 27 days

View Answer	Favorite Question

Answer: Option B

Explanation:

1 দিনে A ও B একত্রে করে ( 1/20 + 1/30) = 1/12 অংশ

B 10 দিনে করে 10/30 অংশ = 1/3 অংশ

অবশিষ্ট ( 1 - 1/3) = 2/3 অংশ

A ও B একত্রে 1/12 অংশ করে 1 দিনে

A ও B একত্রে 1 অংশ করে = ( 12 ×1) দিনে

A ও B একত্রে 2/3 অংশ করে = 12 × 2 /3 = 8 দিনে

মোট সময় লাগে ( 10 + 8) দিন = 18 দিন

729 . A can contains a mixture of two liquids A and B in the ratio 7:5. When 9 liters of mixtures are drawn off and the can is filled with B, the ratio of A and B becomes 7:9. How many liters of liquid A was contained by the can initially?

A. 10
B. 20
C. 21
D. 25

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Answer: Option C

Explanation:

Uttara Bank PLC || Probationary Officer (09-11-2024) || 2024

A. 8 hours
B. 12 hours
C. 10hours
D. 24 hours

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Answer: Option B

Explanation:

A,B and C together need = (3×4)/(3 + 4) = 12/7 hours

And C need 2 hours

∴B need = {(12/7)×2}/{2 - (12/7)} hours

= (24/7)/{(14 - 12)/7}

= 24/2 hours

= 12 hours

731 . A can do a piece of work in 4 hours, B and C together can do it in 3 hours , while A and C together can do it in 2 hours. How long will B alone take to do it?

A. 8 hours
B. 10 hours
C. 12 hours
D. 24 hours
E. None of these

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Answer: Option C

Explanation:

A 1 hour work = 1/4

(B + C) 1 hour work = 1/3

(A + C) 1 hour work = 1/2

(A + B + C) 1 hour work = (1/4 + 1/3) = 7/12

B 1 hour work = ( 7/12 - 1/2) = 1/12

B alone will take 12 hour to do the work.

732 . A can finish a work in 18 days and B can do the same work in half the time taken by A. Then, working together, what part of the same work they can finish in a day ?

A. 2/5
B. 1/6
C. 1/9
D. 2/7

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Answer: Option B

Explanation:

Hints: Given that B alone can complete the same work in day = half the time taken by A = 9 days

A's One day's work = 1/18

B's One days work = 1/9

(A + B)'s one days work = 1/18 + 1/9 = 1/6

733 . A can finish a work in 5 days and B takes 4 days to do the same work. If the work is increased by 8 times, how many days will it take for both of them to finish the work if they work together?

A. 10 days
B. 15 days
C. 20 days
D. 25 days

View Answer	Favorite Question

Answer: Option C

Explanation:

new work size = 1 + 8 = 9 works.
A & B can do in 1 day (working together) = 1/5 + 1/4 = 9/20
Required number of days = 9/(9/20) = 20 days. Ans: C

Officer (Cash) -Sonali Bank | BD Development | BD Krishi Bank - 12.10.2018

A. 60
B. 80
C. 200
D. None of these

View Answer	Favorite Question

Answer: Option B

Explanation:

Let the maximum marks be 'x'.

Then, according to the question.

(25 % of x) + 30 = (50 % of x) - 20

⇒ x/4 + 30 = x/2 - 20

⇒ (x/4) - (x/2) = - 20 - 30

⇒ (x - 2x)/4 = - 50

⇒ - x/4 = - 50

⇒ - x = - 200

⇒ x = 200

So, the maximum marks are 200.

Minimum passing marks are = x/4 + 30 = 200/4 + 30 = 50 + 30 = 80 marks

Minimum passing marks are 80

735 . A car goes 15 km on a gallon of octane when it is driven at 50 km/h. When the car is driven at 60 km/h, it only goes 80% as far. How many gallons of octane are needed to travel 200 km if half the distance is traveled at 50 km/h and the rest 60 km/h?

A. 15.00
B. 16.67
C. 10.60
D. 14.00

View Answer	Favorite Question

Answer: Option A

Explanation:

প্রতিক্ষেত্র গতি ৫০ কিমি/ঘন্টায়

দ্বিতীয় ক্ষেত্রে গতি ৬০ কিমি/ঘন্টায়

প্রতি গ্যালন এ যায় = ১৫ × ৮০/১০০ = ১২ কিমি

৫০ কিমি/ঘন্টায়,

৫ কিমি যায় = ১ গ্যালন অকটেনে

২০০/২ = ১০০ কিমি যায় = ১০০/১৫ গ্যালন

আবার, ৬০ কিমি/ঘন্টায়

১২ কিমি যায় = গ্যালন অকটেনে

১০০ কিমি যায় = ১০০/১২ গ্যলনে

মোট যায় = ১০০/১৫ + ১০০/১২ = ৪০০ + ৫০০/৬০ = ৯০০/৬০ = ১৫ গ্যলন

721 . A boy was asked to multply a number by 7/8 instead he divided the number by 7/8 and got the result 15/14 more than what he should have got if he had multiplied the number by 7/8. The number is ---

722 . A bus travelling at a speed of 5 km/hour, takes 3 hours to complete a distance. If it takes 4 hours to complete the same distance by your car, what is your speed ?

723 . A business firm reduces the number of hours its employees work from 40 hours per week to 36 hours per week while continuing to pay the same amount of money. If an employee earned x taka per hour before the reduction in hours, how much does he earn hour under the new system?

724 . A businessman has 1000 kg of rice, part of which he sells at 8% profit and the rest at 18% profit. He gains 14% on the whole. How much Kg of rice did he sell at 18% profit?

725 . A cake is divided into 18 pieces. If Rehana takes 1 / 3rd of the cake and Rashed takes 1 /3rd of the cake left, how many pieces are left?

726 . A cake is put in the oven at 7.20 am. If the cake takes three quarters of an hour to bake, at what time should it be taken out of the oven?

727 . A can complete a piece of work in 12 days, A, B and C can complete the work in 6 days, Efficiency of B is 0.5 times the efficiency of In how many days C can complete the works= alone?

728 . A can complete a project in 20 days and B can complete the same project in 30 days. A and B start working on the project together and A quits 10 days before the project is expected to be completed. How many days in total will the project take to complete ?

729 . A can contains a mixture of two liquids A and B in the ratio 7:5. When 9 liters of mixtures are drawn off and the can is filled with B, the ratio of A and B becomes 7:9. How many liters of liquid A was contained by the can initially?

730 . A can do 3 piece of work in 4 hours, B and C together in 3 hours , and A and C together in 2 hours. How long will B alone take to do it?

731 . A can do a piece of work in 4 hours, B and C together can do it in 3 hours , while A and C together can do it in 2 hours. How long will B alone take to do it?

732 . A can finish a work in 18 days and B can do the same work in half the time taken by A. Then, working together, what part of the same work they can finish in a day ?

733 . A can finish a work in 5 days and B takes 4 days to do the same work. If the work is increased by 8 times, how many days will it take for both of them to finish the work if they work together?

734 . A candidate scoring 25% marks in an examination fails by 30 marks while another candidate who score 50% marks gets 20 marks more than the minimum pass marks. what is the minimum pass mark?

735 . A car goes 15 km on a gallon of octane when it is driven at 50 km/h. When the car is driven at 60 km/h, it only goes 80% as far. How many gallons of octane are needed to travel 200 km if half the distance is traveled at 50 km/h and the rest 60 km/h?

কোর্স ক্যাটাগরি

প্রয়োজনীয় লিঙ্ক

721 . A boy was asked to multply a number by 7/8 instead he divided the number by 7/8 and got the result 15/14 more than what he should have got if he had multiplied the number by 7/8. The number is ---

722 . A bus travelling at a speed of 5 km/hour, takes 3 hours to complete a distance. If it takes 4 hours to complete the same distance by your car, what is your speed ?

723 . A business firm reduces the number of hours its employees work from 40 hours per week to 36 hours per week while continuing to pay the same amount of money. If an employee earned x taka per hour before the reduction in hours, how much does he earn hour under the new system?

724 . A businessman has 1000 kg of rice, part of which he sells at 8% profit and the rest at 18% profit. He gains 14% on the whole. How much Kg of rice did he sell at 18% profit?

725 . A cake is divided into 18 pieces. If Rehana takes 1 / 3rd of the cake and Rashed takes 1 /3rd of the cake left, how many pieces are left? ​

726 . A cake is put in the oven at 7.20 am. If the cake takes three quarters of an hour to bake, at what time should it be taken out of the oven?

727 . A can complete a piece of work in 12 days, A, B and C can complete the work in 6 days, Efficiency of B is 0.5 times the efficiency of In how many days C can complete the works= alone?

728 . A can complete a project in 20 days and B can complete the same project in 30 days. A and B start working on the project together and A quits 10 days before the project is expected to be completed. How many days in total will the project take to complete ?

729 . A can contains a mixture of two liquids A and B in the ratio 7:5. When 9 liters of mixtures are drawn off and the can is filled with B, the ratio of A and B becomes 7:9. How many liters of liquid A was contained by the can initially?

730 . A can do 3 piece of work in 4 hours, B and C together in 3 hours , and A and C together in 2 hours. How long will B alone take to do it?

731 . A can do a piece of work in 4 hours, B and C together can do it in 3 hours , while A and C together can do it in 2 hours. How long will B alone take to do it?

732 . A can finish a work in 18 days and B can do the same work in half the time taken by A. Then, working together, what part of the same work they can finish in a day ?

733 . A can finish a work in 5 days and B takes 4 days to do the same work. If the work is increased by 8 times, how many days will it take for both of them to finish the work if they work together?

734 . A candidate scoring 25% marks in an examination fails by 30 marks while another candidate who score 50% marks gets 20 marks more than the minimum pass marks. what is the minimum pass mark?

735 . A car goes 15 km on a gallon of octane when it is driven at 50 km/h. When the car is driven at 60 km/h, it only goes 80% as far. How many gallons of octane are needed to travel 200 km if half the distance is traveled at 50 km/h and the rest 60 km/h?

725 . A cake is divided into 18 pieces. If Rehana takes 1 / 3rd of the cake and Rashed takes 1 /3rd of the cake left, how many pieces are left?