2776 . P works twice as fast as Q . If Q can complete a work in 12 days independently , the number of days in which P and Q can together finish the work is:

A. 4 days
B. 6 days
C. 3 days
D. 5 days

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Answer: Option A

Explanation:

Q এর সময় লাগে = 12 দিন

P এর সময় লাগে = 12/2 = 6 দিন

কাজটি দুজনে একত্রে করলে মোট সময় লাগে

= 12 × 6 / 12 + 6 = 72 /18 = 4 দিন।

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2777 . Painting a well costs BDT. 50 per sq. m. If the 20m long wall has a width of 10m , how much would it cost to paint 7/10th of the wall?

A. 5000
B. 10000
C. 8000
D. 7000

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Answer: Option D

Explanation:

দেয়ালটির ক্ষেত্রফল = ২০×১০= ২০০ বর্গমিটার

দেয়ালটির ৭/১০ অংশ হবে= (২০০এর ৭/১০)= ১৪০ ব.মি.

১৪০ ব.মি রং করতে খরচ হবে= ১৪০×৫০= ৭০০০ টাকা

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Sonali &amp- Janata Bank Ltd. Senior Officer (IT/ICT) 08.06.2018

A. 0.99%
B. 1.02%
C. 1.03%
D. 1.00%

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Answer: Option A

Explanation:

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ঢাকা ইলেকট্রিক সাপ্লাই কোম্পানি ।। Assistant Engineer (20-05-2023)

A. 15%
B. 20%
C. 25%
D. None

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Answer: Option B

Explanation:

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গ্যাস ট্রান্সমিশন কোম্পানি লিমিটেড | সহকারী ব্যবস্থাপক | ২০.০৪.২০১৮

A. Tk.3600
B. Tk.6000
C. Tk.9600
D. Tk.18000

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Answer: Option D

Explanation:

1 column x 1 inch ≡ 1200 TK

So, total cost = 5 x 3 x 1200 = 18000 TK.

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2781 . Per day wage rate of workers is reduced 50% due to economic slowdown. After one year, the wage rate is increased by 60%. If the per day wage rate before the decrease was Tk 100, then what is the per day wage rate now?

A. 90
B. 100
C. 60
D. 80

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Answer: Option D

Explanation:

After reduction it became=100-(100×50%)=50 taka

Now, the rate is=50+(50×60%)=80 taka

(ans)

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2782 . Perimeter of rectangle is 200 meter. Its width is 3/7 of its length . What is the length in meter ?

A. 60
B. 50
C. 90
D. 70

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Answer: Option D

Explanation:

In case of a rectangle,

2(Length + Width) = perimeter

or, 2(Length + 3/7 of Length) = 200

or, 10/7 of Length = 200/2

So, Length = 200/2 x 7/10 = 70 meter

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2783 . Peter purchased a machine for TK. 80,000 and spent TK. 5,000 on repair and TK. 1,000 on transport and sold it with 25% profit , At what price did he sell the machine ?

A. TK.1,06,250
B. TK.1,07,500
C. TK.1,17,500
D. TK. 1,05,100

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Answer: Option B

Explanation:

Total expense = ( 80, 000 + 5, 000 + 1, 000) = 86, 000Tk

At 25% profit,

Selling price = 86, 000 + 86, 000 × 25/100 = 1, 07, 500.

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Bangladesh Bank - Officer(Cash) - 2016

A. Macbeth
B. Hamlet
C. Lear
D. Antigone

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Answer: Option A

Explanation:

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খ ইউনিট (2009-2010) || ঢাকা বিশ্ববিদ্যালয় || 2009

A. 263
B. 383
C. 242
D. 111
E. None of them

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Answer: Option C

Explanation:

The odd one out in the given list is 242.

All the other numbers in the list are odd, while 242 is the only even number.

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2786 . Pick up the stranger of the series: 2,4,8,10,16,32

A. 10
B. 32
C. 16
D. 8

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Answer: Option A

Explanation:

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DESCO Recruitment Test 2022 | Sub Station Attendant | 17.09.2022

A. 2
B. 2.5
C. 3
D. 3.5

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Answer: Option C

Explanation:

Hints: Pipe A, B, and C can fill the tank in 1 hour

( 1/5 + 1/10 + 1/30) portion

= (12 + 6 + 2)/6o portion

= 20/60 portion

= 1/3 portion

All three pipes will fill the tank in 3 hours.

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2788 . Pipe P can fill and empty tank in 4 hours but pipe Q can completely empty the same tank in 8 hours. But the pipes were opened alternately after every two hours starting with pipe P then in how many hours, the tank was completely filled ?

A. 6 hours
B. 5 hours
C. 10 hours
D. 12 hours

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Answer: Option C

Explanation:

Let, Capacity of tank be 8 liter (LCM of 4,8)

In 1 hour P fill = (8/4) = 21

Q empty = (8/8) = 1L

In last 2 hour only p works and fill = 2x 2 = 4L

Remains = 8 - 4 = 4 L.

Now,

in 4 hour net filling of P and Q = (2x 2) - (1 x2) = 2L

2L net fill in 4 hr

4L net fill in = (4×4)/2 = 8 hr

Total time = 8 + 2 = 10 hr (Ans)

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

2789 . Pipes A and B can fill a tank in 5 and 6 hours respectively. Pipe C can empty it in 12 hours. If all the three pipes are opened together, then the tank will be filled in:

A. $2 \frac{8}{11} h o u r s$
B. $3 \frac{9}{17} h o u r s$
C. $4 \frac{1}{2} h o u r s$
D. $1 \frac{13}{17} h o u r s$

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Answer: Option B

Explanation:

A in 1 hour fills 1/5 part

B in 1 hour fills 1/6 part

C in one hour empties 1/12 Part

Together they fill in 1 hour

= 1/5 + 1/6 - 1/12 = (12 + 10 - 5)/60 = 17/60 part

Total Time = 60/17 = 3 (9/17) hours

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Bangladesh Bank - Officer(Cash) - 2016

A. 100
B. 120
C. 140
D. 180

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Answer: Option B

Explanation:

Let the distance between City A and City B be "D" kilometers.

Palash drives from City A to B at 40 km per hour, so the time taken for the first leg of the journey is D/40 hours.

He returns over the same road at 30 km per hour, so the time taken for the return journey is also D/30 hours.

He spends 8 hours away from home, including a one-hour stop for lunch. Therefore, the total driving time is 8 - 1 = 7 hours.

Now, we can set up an equation using the time formula (Time = Distance / Speed) for the total driving time:

(D/40) + (D/30) = 7

To solve for D, we can find a common denominator and then solve for D:

(3D/120) + (4D/120) = 7

Now, combine the fractions:

(7D/120) = 7

To isolate D, multiply both sides of the equation by 120/7:

D = (7 * 120) / 7

D = 120 kilometers

So, the distance between City A and City B is 120 kilometers. The answer is 120.

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2776 . P works twice as fast as Q . If Q can complete a work in 12 days independently , the number of days in which P and Q can together finish the work is:

2777 . Painting a well costs BDT. 50 per sq. m. If the 20m long wall has a width of 10m , how much would it cost to paint 7/10th of the wall?

2778 . parentage installed of hydrophilic power plant of BPDB is ____

2779 . Pens that used to cost Tk. 150 for a package of 3 now cost Tk. 300 for a package of 5. What is the percent increase in the price of these pens?

2780 . Per column inch (1 column x 1 inch) area newspaper advertisment costs Tk.1200. How much would a "5 columns by 3 inches" newspaper advertisment cost?

2781 . Per day wage rate of workers is reduced 50% due to economic slowdown. After one year, the wage rate is increased by 60%. If the per day wage rate before the decrease was Tk 100, then what is the per day wage rate now?

2782 . Perimeter of rectangle is 200 meter. Its width is 3/7 of its length . What is the length in meter ?

2783 . Peter purchased a machine for TK. 80,000 and spent TK. 5,000 on repair and TK. 1,000 on transport and sold it with 25% profit , At what price did he sell the machine ?

2784 . Pick the odd one out.

2785 . Pick the odd one out -331, 482, 551, 263, 383, 242, 111

2786 . Pick up the stranger of the series: 2,4,8,10,16,32

2787 . Pipe A can fill a tank in 5 hours, pipe B in 10 hours and pipe C in 30 hours. If all the pipes are open, in how many will the tank be filled?

2788 . Pipe P can fill and empty tank in 4 hours but pipe Q can completely empty the same tank in 8 hours. But the pipes were opened alternately after every two hours starting with pipe P then in how many hours, the tank was completely filled ?

2790 . Plash drives from city A to B at 40 km per hour and returns over the same road at 30 km per hour and spends 8 hours away from home including a one hour stop for lunch. what is the distance (in km) between city A and city B?

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