3586 . Two trains are running in opposite directions with the same speed. If the length of each train is 120 meters and they cross each other in 12 seconds, then the speed of each train (in km/hr) is :

A. 10
B. 18
C. 72
D. 36

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Answer: Option D

Explanation:

V=d/t

=(120+120)/12

=20×(18/5) km/hr

=72 km/hr

So,

Speed of each train=72/2=36 km/hr

(ans)

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3587 . Two trains are running on parallel lines in the same direction at a speed of 50 km/hr and 30 km/hr respectively. The faster train crosses a man sitting in the slower in 18 seconds. What is the length of the faster train?

A. 170 m
B. 150 m
C. 100 m
D. 64 m
E. None of these

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Answer: Option C

Explanation:

Hints: আপেক্ষিক বেগ ( 50 - 30) km/hr = 20 km/hr

= 20000m/3600s

3600 সেকেন্ডে যায় 20000 মিটার

18 সেকেন্ডে যায় ( 20000×18)/3600 = 100 মিটার

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3588 . Two trains of equal length are running on parallel lines in the same direction at 46km and 36km per hour. The faster train passes the slower train in 36 seconds. The length of each train is -

A. 80m
B. 72m
C. 50m
D. 82m

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Answer: Option C

Explanation:

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জনতা ব্যাংক || অফিসার (আরসি) (28-06-2024) || 2024

A. 195 m
B. 175 m
C. 190 m
D. 180 m

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Answer: Option D

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3590 . Two trains starting at the same time from 2 statins 400 km apart and going in opposite direction corss each other at a distacne of 240 km from one of the stations. What is the ratio of their speeds?

A. 3 : 2
B. 4 : 3
C. 5 : 3
D. None

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Answer: Option A

Explanation:

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শিল্প মন্ত্রণালয়ের অধীন বিসিআইসি | সহকারী ব্যবস্থাপক (প্রশাসন) | ০৮.১২.২০১৮

A. 5 : 7
B. 3 : 5
C. 3 : 4
D. 4 : 5

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Answer: Option C

Explanation:

A. 5 : 7

5x + 7x = 72

12x = 72

x = 6

B. 3 : 5

3x + 5x = 72

x = 9

C. 3 : 4

3x + 4x = 72

x = 72/7

D. 4:5

4x + 5x = 72

x = 8

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3592 . two workers, working sepparately but at the same speed,take 2 hours 40 minutes to complete a particular task.How long will one of these two workers take to complete the same task alone?

A. 1 hour 20 minutes
B. 4 hours 40 minute
C. 5 hours
D. 5 hours 20 minute

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Answer: Option D

Explanation:

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3593 . Two years ago, Tim was three times as old as susie . Today he is twice as old as susie. How old is Tim today?

A. 2
B. 4
C. 6
D. 8
E. None of them

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Answer: Option D

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3594 . Unscramle the letters of the following words and find the odd one out.

A. LAFOLOT
B. RTCEIKC
C. ETBLA
D. OLFG

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Answer: Option C

Explanation:

Scarmble মানে অগোছালো। প্রদত্ত word - গুলো unscramble অর্থাৎ সাজালে যথাক্রমে পাওয়া যায় FOOTBALL, CRICKET, TABLE, এবং GOLF, Odd one অর্থাৎ এদের সাথে যেটি মিলে না সেটি হচ্ছে TABLE।

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3595 . Walking three-fourth of his normal speed, Rafi is 16 minutes late in reaching his office. The usual time taken by him to cover the distance between his home and office.

A. 48 min
B. 60 min
C. 42 min
D. 64 min

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Answer: Option A

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বাংলাদেশ টেলিযোগাযোগ নিয়ন্ত্রণ কমিশন || সহকারী পরিচালক (19-02-2021)

A. 2/3
B. 4/3
C. 5/2
D. 3/8

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Answer: Option B

Explanation:

Let the required flow rate of pipe B be X gallons per hour.

Together they fill (2 - X) gallons per hour.

ATQ, 64 / (2 - X) = 96)

Or, 64 / 96 = 2 - X

Or, X = 2 - 64 / 96 = 4/3 gallons per hour.

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3597 . Water has been poured into an empty rectangular tank at the rate of 5 cubic feet per minute for 6 minutes. The length of the tank is 4 feet and the width is one half of the length. How deep is the water in the tank?

A. 7.5 inches
B. 3 ft. 9 inches
C. 3 ft. 7.5 inches
D. 7 fit. 6 inches

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Answer: Option B

Explanation:

6 minute ধরে 5 cubic feet = 5*6 = 30 cubic feet in tank

length = 4ft, then width = 4/2 = 2ft

therefore, base area = 4*2 = 8 sq ft

base area*depth = 8*depth = 30 cubic ft

depth = 30/8 = 3.75 feet = 3 ft 9 inches

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বাংলাদেশ বনশিল্প উন্নয়ন কর্পোরেশন সহকারী ব্যবস্থাপক-০২.০৮.২০১৩

A. 4% increase
B. 4% decrease
C. 5% decrease
D. No change

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Answer: Option B

Explanation:

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3599 . Wendy has 5 pairs of pants and 8 shirts. How many different combinations can she make with these items?

A. 13
B. 24
C. 40
D. 21

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Answer: Option C

Explanation:

No of shirts =8

No. of pants =5

No. of ways he can wear his clothes = No. of ways he can wear a shirt AND No. of ways to wear pant =8×5=40.

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সহকারী পরিচালক(AD) -12.11.2021

A. +
B. -
C. ×
D. ÷

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Answer: Option C

Explanation:

Hints: = 2×6 - 12÷4 + 2 = 2 × 6 - 3 + 2 = 12 - 3 + 2 = 11

answer : ×

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Bangladesh Bank - Assistant Director - 2016

3586 . Two trains are running in opposite directions with the same speed. If the length of each train is 120 meters and they cross each other in 12 seconds, then the speed of each train (in km/hr) is :

3587 . Two trains are running on parallel lines in the same direction at a speed of 50 km/hr and 30 km/hr respectively. The faster train crosses a man sitting in the slower in 18 seconds. What is the length of the faster train?

3588 . Two trains of equal length are running on parallel lines in the same direction at 46km and 36km per hour. The faster train passes the slower train in 36 seconds. The length of each train is -

3589 . Two trains P and Q are moving in opposite direction at a rate of 36 km/hr and 45 km/hr respectively. A passenger is sitting in train P, finds that his train passes train Q in 8 seconds. What is the length of train Q?

3590 . Two trains starting at the same time from 2 statins 400 km apart and going in opposite direction corss each other at a distacne of 240 km from one of the stations. What is the ratio of their speeds?

3591 . Two whole numbers whose sum is 72 cannot be in the ratio :

3592 . two workers, working sepparately but at the same speed,take 2 hours 40 minutes to complete a particular task.How long will one of these two workers take to complete the same task alone?

3593 . Two years ago, Tim was three times as old as susie . Today he is twice as old as susie. How old is Tim today?

3594 . Unscramle the letters of the following words and find the odd one out.

3595 . Walking three-fourth of his normal speed, Rafi is 16 minutes late in reaching his office. The usual time taken by him to cover the distance between his home and office.

3596 . Water flows into an empty 64-gallon drum through pipe A and follows out through pipe B. If the rate of flow through A is 2 gallons/h, how many gallons per hour must flow out through pipe B so that the drum is full in exactly 96 hours?

3597 . Water has been poured into an empty rectangular tank at the rate of 5 cubic feet per minute for 6 minutes. The length of the tank is 4 feet and the width is one half of the length. How deep is the water in the tank?

3598 . Water tax is increased by 20% but its consumption is decreased by 20%. Then the increase or decrease in the expenditure of the money is--

3599 . Wendy has 5 pairs of pants and 8 shirts. How many different combinations can she make with these items?

3600 . What mathematical operation should come at the place of '?' in the equation : 2 ? 6 - 12 ÷ 4 + 2 = 11

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