1381 . An athlete runs 200 metres race in 24 seconds. His speed is :

A. 20 km/hr
B. 24 km/hr
C. 28.5 km/hr
D. 30 km/hr

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Answer: Option D

Explanation:

His speed = 200/24 metre per second

= (200/24) × 18/5 km/hr

= 30 km/hr

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1382 . An automobile financier claims to be lending money at simple interest, but he includes the interest every six months for calculating the principal. If he is charging an interest of 10%, the effective rate of interest becomes---

A. 10%
B. 10.25%
C. 10.75%
D. 11%
E. None of these

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Answer: Option E

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1383 . An economist estimates that the cost of living will increased by 8.5% over the next three years. How much should a piece of candy cost in three years from now if it costs Tk.1.50 today?

A. Tk.12.75
B. Tk.0.1275
C. Tk.1.37
D. Tk.1.63

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Answer: Option D

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1384 . An electric pole casts a $\sqrt{3}$ m long shadow on the ground at an elevation $60 °$ , the height o fthe pole is-

A. $3 m$
B. $3 \sqrt{3} m$
C. $3 \sqrt{2} m$
D. $2 \sqrt{3} m$

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Answer: Option A

Explanation:

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সমন্বিত ৭ ব্যাংক ও ১টি আর্থিক | সিনিয়র_অফিসার | 27-11-2021

A. 15%
B. 22%
C. 24%
D. 20%

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Answer: Option D

Explanation:

To find the percent increase, you can use the following formula:

Percent Increase = [(New Value - Old Value) / Old Value] * 100

In this case:

Old Annual Salary = Tk. 90,000 - Tk. 15,000 = Tk. 75,000 New Annual Salary = Tk. 90,000

Now, calculate the percent increase:

Percent Increase = [(90,000 - 75,000) / 75,000] * 100

Percent Increase = (15,000 / 75,000) * 100

Percent Increase = (1/5) * 100

Percent Increase = 20%

So, the percent increase in the employee's annual salary is 20%.

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সহকারী পরিচালক(AD) -12.11.2021

A. Tk.1260
B. Tk.4800
C. Tk.7200
D. Tk.7560

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Answer: Option D

Explanation:

To find the amount of Dearness Allowance (DA) that the employee is entitled to, we can multiply their basic pay by 20%:

DA = Basic pay x 20%
DA = 6300 x 20%
DA = 1260

So the employee is entitled to a Dearness Allowance of Tk. 1260.

The total pay of the employee would be their basic pay plus their Dearness Allowance:

Total pay = Basic pay + DA
Total pay = 6300 + 1260
Total pay = 7560

Therefore, the total pay of the employee would be Tk. 7560.

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1387 . An employee may claim Tk. 7 for each kilometer when he travels by taxi and Tk. 6 for each kilometer when he drives his own car. If in one week he claimed Tk. 900 for traveling 135 km, how many kilometers did he travel by taxi?

A. 90 km
B. 100 km
C. 110 km
D. 120 km

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Answer: Option A

Explanation:

Let x and y be the respective km's travelled by man via taxi and by his own car.
Given x + y = 135 => x = 135- y
But according to the question,
7x + 6y = 900
7(135-y) + 6y = 900
=> 945 - 7y + 6y = 900
=> y = 945 - 900= 45
=> x = 135 - 45 = 90
Therefore, the distance travelled by taxi is 90 km.

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বাংলাদেশ ব্যাংক অফিসার ০২ -১২-২০২২

A. 200
B. 210
C. 230
D. None of these

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Answer: Option D

Explanation:

An employee pays 3 workers X, Y and Z a total of TK. 600 a week. X is paid 125% of the amount Y is paid and 80% of the amount Z is paid. How much does X make in a week? x = yx125 / 100, x:y = 5:4 y = zx80/100, y:x = 4:5 x:y: z. 20:16:20 = 5:4:5 Share: X = 600x(5/14) = Tk.214.29 .

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Bangladesh Bank - Assistant Director - 2001

1389 . An empty bucket being filled with paint at a constant rate takes 6 minutes to 7 be filled to 10 of its capacity. How much more time will it take to fill the bucket to full capacity?

A. $2 m i n u t e s$
B. $3 m i n u t e s$
C. $2 a n d \frac{4}{2} m i n u t e s$
D. $8 a n d \frac{4}{7} m i n u t e s$
E. $2 h o u r s a n d \frac{4}{7} m i n u t e s$

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Answer: Option E

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Bangladesh Bank - Officer(Cash) - 2011

A. 5 hours 20 minutes
B. 4 hours 40 minutes
C. 4 hours 20 minutes
D. 2 hours 48 minutes

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Answer: Option B

Explanation:

Remaining part = 1 - 3/5 = 2/5

3/5 part of the pool is filled in 7 hours

So, 2/5 part of the pool is filled in 7 x (2/5) / (3/5) hours

= 7 x 2 / 3 hours = 14 / 3 x 60 minutes = 280 minutes = 4 hours 40 minutes

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1391 . An empty pool is being filled with water at a constant rate. It takes 6 hours to fill 2/3rd of the pool. How much time will it take to completely fill the pool?

A. 15
B. 9
C. 10
D. 12

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Answer: Option B

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1392 . An empty pool is being filled with water at a constant rate. It takes 9 hours to fill 3/5 th of the pool. How much more time will it take to compeletely fill the pool?

A. 15
B. 9
C. 10
D. None of these

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Answer: Option A

Explanation:

***This question is erroneous....

Part of the pool remaining to be filled = 1 - 3/5 = 2/5

3/5 of the pool can be filled in 9 hours

So, the entire pool can be filled in 9×5/3 = 15 hours

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1393 . An empty swimming pool can be filled to capacity through an inlet pipe in 3 hours, and it can be completely drained by a drainpipe in 6 hours . If both pipes are fully open at the same time , in how many hours will the empty pool be filled to capacity?

A. 4
B. 6
C. 5
D. 5.5
E. None of these

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Answer: Option B

Explanation:

Inlet pipe fill 1/3 part of the pool in 1 hour

Drain pipe drains 1/6 part of the pool in 1 hour

So, together they fill (1/3 - 1/6 = 1/6) part of the pool in 1 hour

So, together they will fill the pool completely in 6 hours

[Shortcut : (Inlet×Outlet) / (Outlet - Inlet) = (3×6) / (6 - 3) = 6 hr]

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Jamuna Bank Ltd - Probationary Officer - 2009

A. 4
B. 6
C. 5
D. 5.5

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Answer: Option B

Explanation:

Inlet pipe fill 1/3 part of the pool in 1 hour

Drain pipe drains 1/6 part of the pool in 1 hour

So, together they fill (1/3 - 1/6 = 1/6) part of the pool in 1 hour

So, together they will fill the pool completely in 6 hours

[Shortcut : (Inlet×Outlet) / (Outlet - Inlet) = (3×6) / (6 - 3) = 6 hr]

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1395 . An empty swimming pool with a capacity of 5760 gallons is filled at a rate of 12 gallons per minute. How many does it take to fill the pool to capacity?

A. 8
B. 20
C. 96
D. 480

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Answer: Option D

Explanation:

Filled 12 gallons in 1 min

Filled 5760 gallons in = 5760 /12 min

= 5760/( 12 ×60) hours

= 8 hours

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1381 . An athlete runs 200 metres race in 24 seconds. His speed is :

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1382 . An automobile financier claims to be lending money at simple interest, but he includes the interest every six months for calculating the principal. If he is charging an interest of 10%, the effective rate of interest becomes---

1383 . An economist estimates that the cost of living will increased by 8.5% over the next three years. How much should a piece of candy cost in three years from now if it costs Tk.1.50 today?

1385 . An employee's annual salary was increased Tk. 15,000. If her new annual salary now equals Tk. 90,000, what was the percent increase?

1386 . An employee is entitled to 20% of his basic pay as Dearness Allowance(DA). If his basic pay is Tk.6300, what is total pay.

1387 . An employee may claim Tk. 7 for each kilometer when he travels by taxi and Tk. 6 for each kilometer when he drives his own car. If in one week he claimed Tk. 900 for traveling 135 km, how many kilometers did he travel by taxi?

1388 . An employee pays 3 workers X,Y and Z a total of TK. 600 a week . X is paid 125% of the amount Y is paid and 80% of the amount Z is paid . How much does X make in a week ?

1390 . An empty pool is being filled with water at a constant rate, 3/5 th of the pool has filled in 7 hours. How much more time will it take to completely fill the pool?

1391 . An empty pool is being filled with water at a constant rate. It takes 6 hours to fill 2/3rd of the pool. How much time will it take to completely fill the pool?

1392 . An empty pool is being filled with water at a constant rate. It takes 9 hours to fill 3/5 th of the pool. How much more time will it take to compeletely fill the pool?

1393 . An empty swimming pool can be filled to capacity through an inlet pipe in 3 hours, and it can be completely drained by a drainpipe in 6 hours . If both pipes are fully open at the same time , in how many hours will the empty pool be filled to capacity?

1394 . An empty swimming pool can be filled to capacity through an inlet pipe in 3 hours and it can be completely drained by a drainpipe in 6 hours. If both pipes are fully open at the same time, in how many hours will the empty pool be filled to capacity?

1395 . An empty swimming pool with a capacity of 5760 gallons is filled at a rate of 12 gallons per minute. How many does it take to fill the pool to capacity?

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