106 . A man takes 3 hours 45 minutes to row a boat 22.5 km downstream of a river and 2 hours 30 minutes to cover a distance of 10 km up stream . Find the speed of the river current in km /hr.

A. 1 km/hr
B. 2 km/ hr
C. 3 km /hr
D. 4km/ hr

View Answer	Favorite Question

Answer: Option A

Explanation:

Speed of the boat = x kmph, the river current = y mph.
3H45M = (3 + 45/60) hr = 15/4 hr
2H30M = (2 + 30/60) hr = 5/2 hr.
According to the question:
x + y = 22.5/(15/4) = 6
x - y = 10/(5/2) = 4
2x = 2
x = 1.
Ans: A

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

A. 18
B. 24
C. 36
D. 45

View Answer	Favorite Question

Answer: Option B

Explanation:

লোকটি প্রথম 2 ঘণ্টা অতিক্রম করে = 30 × 2 = 60 মাইল

∴ Average speed = মোট দূরত্ব / মোট সময়

= ( 60 + 60)/(2 + 3)

= 120/5

= 24 mph

সমন্বিত ৮ ব্যাংক | অফিসার | 21-01-2022

A. TK. 75
B. TK. 175
C. TK. 225
D. TK. 240
E. TK. 250

View Answer	Favorite Question

Answer: Option D

Explanation:

First 100 jars cost = 100×.56 = 56Tk.

Next 200 jars cost = 200×.56 = 110tk

Total cost for 300 jars = 56 + 110 = 166 Tk.

The selling price for the 300 jars of pickles = 166 + 75 = 241 Tk.

correct answer 241

Bangladesh Bank - Assistant Director - 2013 ||

A. 400kg
B. 560kg
C. 600kg
D. 640kg

View Answer	Favorite Question

Answer: Option C

Explanation:

ধরি, 18% profit - এ বিক্রি করে x Kg

8% profit এ বিক্রি করে ( 1000 - x) Kg

(1000 - x) × 8/100 + x × 18/100 = 1000 এর 14/100

8000 - 8x + 18x = 14000

10x = 14000 - 8000

x = 6000/10

x = 600

110 . a motor -cycle covers 40 Km with a speed of 20 km /hr. Find the speed of the motor -cycle for the next 40 km journey so that the average speed of the whole journey will be 30 km / hr.

A. 70.0km /hr
B. 52.5km /hr
C. 60.0km/hr
D. 60. 5 km / hr

View Answer	Favorite Question

Answer: Option C

Explanation:

Let the desired speed be x km/hr
ATQ,
40/20 + 40/x = 80/30
Or, 1/20 + 1/x = 2/30
Or, 1/x = 1/15 - 1/20
Or, 1/x = (4 - 3)/60
Or, x = 60
So, the desired speed is 60 km/hr

Sonali- Rupali- Bangladesh Krishi- Rajshahi krishi unnayn-Investment Corporation of Bangladesh | 30.11.2018

A. 70
B. 52.5
C. 60
D. 60.5

View Answer	Favorite Question

Answer: Option C

Explanation:

Let the desired speed be x km/hr
ATQ,
40/20 + 40/x = 80/30
Or, 1/20 + 1/x = 2/30
Or, 1/x = 1/15 - 1/20
Or, 1/x = (4 - 3)/60
Or, x = 60
So, the desired speed is 60 km/hr

Senior Officer- 8 Bank Recruitment Test 31-08-2018

A. 165%
B. 90%
C. 65%
D. 10%
E. None of these

View Answer	Favorite Question

Answer: Option E

Explanation:

Trucks = 30% of 300 = 90

Other Vehicles (Excluding Trucks) = 300 - 90 = 210

Diesel Vehicle = 20% of 300 = 60 (Including 15 Trucks)

Other Diesel Vehicles (Excluding Trucks) = 60 - 15 = 45

Trucks that are NOT diesel = 90 - 15 = 75

Other Vehicles that are NOT diesel Vehicles = 210 - 45 = 165

Required % = (165/300)×100 = 55%

113 . A motorcyclist rode to work at an average speed of 15 miles per hour and returned home along the same route at an average speed of 45 miles per hour. If his entire traveling time was 1 hour, what was the total number of miles in the round trip?

A. 30
B. 36.5
C. 45
D. 15
E. 22.5

View Answer	Favorite Question

Answer: Option E

Explanation:

He travels 20 miles at a speed of 15 mph so he takes 20/15 = 4/3 hrs to travel one way. Since total time is 2 hrs, he must have taken 2 - 4/3 = 2/3 hrs while returning.
Speed while returning = 20/(2/3) = 30 mph

114 . A number consists of two digits. The sum of the digits is 10. If 72 is subtracted from the number, it's digits are interchanged. Find the number.

A. 82
B. 37
C. 55
D. 73
E. 91

View Answer	Favorite Question

Answer: Option E

Explanation:

Let's use algebra to solve this problem. Let the two-digit number be represented as 10a + b, where 'a' is the tens digit and 'b' is the units digit.

We are given two conditions:

The sum of the digits is 10, so we can write the equation: a + b = 10

When 72 is subtracted from the number, the digits are interchanged. This means that 10a + b - 72 becomes 10b + a. We can write this as another equation: 10a + b - 72 = 10b + a

Now, let's solve this system of equations:

From equation 1, we can express 'b' in terms of 'a': b = 10 - a

Substitute this expression for 'b' into equation 2: 10a + (10 - a) - 72 = 10(10 - a) + a

Now, simplify and solve for 'a': 10a + 10 - a - 72 = 100 - 10a + a

Combine like terms: 9a + 10 - 72 = 100 - 9a

Subtract 10 from both sides: 9a - 62 = 100 - 9a

Add 9a to both sides: 18a - 62 = 100

Add 62 to both sides: 18a = 162

Divide by 18: a = 9

Now that we have found 'a' to be 9, we can find 'b' using the first equation: a + b = 10 9 + b = 10

Subtract 9 from both sides: b = 10 - 9 b = 1

So, the tens digit 'a' is 9, and the units digit 'b' is 1. Therefore, the two-digit number is 91.

115 . A number is as much greater than 36 as is less than 86 . Find the number.

A. 68
B. 43
C. 61
D. 73

View Answer	Favorite Question

Answer: Option C

Explanation:

Officer (General) -Ansar VDP Unnayan | BD House Building Finance Corporation 28.09.2018

A. 0.04
B. 0.25
C. 0.40
D. 2.5
E. 25

View Answer	Favorite Question

Answer: Option E

Explanation:

Truncate - কেটে ছোট করা, wind up - শেষ করা । বাক্যের অর্থ – যখন আমরা দেখলাম, আমাদের সময় প্রায় শেষ, প্রত্যেককে তার পারফরম্যান্স শেষ করতে বললো ।

Agrani Bank Ltd. Recruitment Test for Senior Officer 12.02.2010

A. 9
B. 14
C. 20
D. 6
E. 15

View Answer	Favorite Question

Answer: Option E

Explanation:

We know, divident = quotient x divisor + remainder

So, divident = quotient x 105 + 99

Now, 105 is completely divisible by 21 yielding the quotient 5. So, we only need to divide the remainder 99 by 21 to see if any remainder remains.

Now, 99 = 4 x 21 + 15. So, 15 will be remained as a remainder if the number is divided by 21 instead of 105.

118 . A passenger paid 50% customs duty on accompanied baggage items. He paid another 20% sales tax on the total value of the items plus the custom duty paid. The total custom duty and sales tax is Tk. 350. what is the value of the item custom duty and sales tax?

A. Tk.400
B. Tk. 450
C. Tk. 500
D. None these

View Answer	Favorite Question

Answer: Option D

Explanation:

Let,value of item be 100x

Custom duty=50%

value of item with custom duty =150x

Another 20% sales tax duty=150x×20%=30x

Total custom duty and sales tax= 50+30=80x

ATQ,

350/80x × 100x = 437.5

Ans: None these

বাংলাদেশ ব্যাংক || সহকারী পরিচালক 28-10-2022

A. 30
B. 35
C. 40
D. 50

View Answer	Favorite Question

Answer: Option C

Explanation:

A person's present age is two-fifth of the age of his mother. After 8 years , he will be one-half of the age of his mother . How old is the mother at present ?

Let, present age of mother = x
present age of the person or son = 2x/5

After 8 year,
mother's age = x+8
son's age = 2x/5 + 8

As per question,
2x/5 + 8 = (x+8)/2
or, (x+8)/2 - 2x/5 = 8
or, x=40

So, present age of mother = 40 years (Ans:)

Bangladesh Bank - Assistant Director - 2016

A. Tk. 1580
B. Tk. 1180
C. Tk. 1260
D. Tk. 1225

View Answer	Favorite Question

Answer: Option C

Explanation:

For 5% loss, buying price of watch = (1140*100)/95 = 1200 tk

For earning 5% profit, selling price should be = (1200*105)/100 = 1260 tk (Ans)

106 . A man takes 3 hours 45 minutes to row a boat 22.5 km downstream of a river and 2 hours 30 minutes to cover a distance of 10 km up stream . Find the speed of the river current in km /hr.

107 . A man travels for 2 hours at 30 miles an hour and he covers 60 miles in the next 3 hours . What is the average speed per hour for the entire trip?

108 . A manufacturer of pickles wants to make a profit of TK. 75 when he sells 300 jars of pickles. It costs TK. 0.65 each to make the first 100 jars of pickles and TK. 0.55 each to make after the first 100. What price should he charge for the 300 jars of pickles ?

109 . A merchant has 1000 kg of sugar, part of which he sells at 8% and the remaining at 18% profit. He gains 14% on the whole. Find the quantity of sugar that he sold at 18% profit.

110 . a motor -cycle covers 40 Km with a speed of 20 km /hr. Find the speed of the motor -cycle for the next 40 km journey so that the average speed of the whole journey will be 30 km / hr.

111 . A motor cycle covers 40 km with a speed of 20 km/hr. Find the speed of the journy so that the average speed of the whole journey will be 30 km/hr?

112 . A motor pool has 300 vehicles of which 30% are trucks. 20% of all the vehicles in the motor pool are diesel, including 15 trucks. What percent of the motor pool is composed of vehicles that are nither trucks nor diesel?

113 . A motorcyclist rode to work at an average speed of 15 miles per hour and returned home along the same route at an average speed of 45 miles per hour. If his entire traveling time was 1 hour, what was the total number of miles in the round trip?

114 . A number consists of two digits. The sum of the digits is 10. If 72 is subtracted from the number, it's digits are interchanged. Find the number.

115 . A number is as much greater than 36 as is less than 86 . Find the number.

116 . A number is multiplied by 4 and then the product is divided by 100. This same result can be obtained if the original number is divided by--

117 . A number when divided by 105 leaves 99 as remainder. What will be the number if the number is devided by 21?

118 . A passenger paid 50% customs duty on accompanied baggage items. He paid another 20% sales tax on the total value of the items plus the custom duty paid. The total custom duty and sales tax is Tk. 350. what is the value of the item custom duty and sales tax?

119 . A person's present age is two - fifth of the age of his mother. After 8 years. he will be one half of the age of his mother . What is the present age of the mother?

120 . A person incurs a loss of 5 % by selling a watch for Tk. 1140. At what price should the watch be sold to earn 5% profit?

কোর্স ক্যাটাগরি

প্রয়োজনীয় লিঙ্ক