3571 . Two pipes A and B can fill a tank in 6 hours and 4 hours respectively. If they are opened on alternate hours and if pipe A is opened first, in how many hours, the tank shall be full ?

A. 4
B. 4.5
C. 5
D. 5.5

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Answer: Option C

Explanation:

(A + B) ' 2 hours work when open d = 1/6 + 1/4 = 5/12

(A + B) 4 hours work when open = 5/12 × 2 = 5/6

Remaining work 1 - 5/6 = 1/6

Now, its A turn in 5th hour

1/6 work will be done by A in 1 hour

Total time = 4 + 1 = 5 hours

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

3572 . Two planes leave the airport at the same time, Minutes later, plane A is 70 miles due north of the airport. How far apart are the two airplanes?

A. 182 miles
B. 119 miles
C. 163.8 miles
D. 238 miles

View Answer	Favorite Question

Answer: Option A

Explanation:

Distance between two plane = √ (33)² + (56)² = 65

সহকারী পরিচালক(AD) -12.11.2021

A. 175m
B. 200m
C. 273m
D. 300m

View Answer	Favorite Question

Answer: Option C

Explanation:

Dhaka Bank Ltd | Probationary Officer | 05-02-2021

A. 22
B. 17
C. 12
D. 9

View Answer	Favorite Question

Answer: Option D

Explanation:

Dhaka Bank Ltd | Probationary Officer | 05-02-2021

A. TK. 250
B. TK. 275
C. TK. 280
D. TK. 300
E. None of these

View Answer	Favorite Question

Answer: Option A

Explanation:

Suppose, y=a

So, x=a×120/100

=6a/5

According to question,

a+6a/5=550

11a/5=550

11a=2750

a=250

answer: Y is paid 250

3576 . Two taps A and B can fill a tank in 5 hours and 20 hours respectively. If both the taps are open then due to a leakage, it took 30 minutes more to fill the tank. If the tank is full, how long will it take for the leakage alone to empty the tank ?

A. 4.5 hrs
B. 7 hrs
C. 18 hrs
D. 36 hrs

View Answer	Favorite Question

Answer: Option D

Explanation:

A ও B একত্রে tank টি পূর্ন করে = 20×5/20×5 = 100/25 ঘন্টা = 4 ঘন্টা।

Leakage সহ A ও B tank টি পূর্ণ করে ( 4 + 1/2) ঘন্টায় = 9/2 ঘন্টায়

Leakage 1 ঘন্টায় খালি করে ( 1/4 - 2/9) অংশ = 9 - 8 /36 = 1/36

Leakage দ্বারা tank টি খালি হয়. 36 ঘন্টায়

3577 . Two third of the faculty members of a department are female. Twelve of the male faculty members are unmarried, while 60% of them married. What is the total number of faculty members in the department?

A. 90
B. 60
C. 30
D. none of these

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Answer: Option A

Explanation:

Unmarried male faculty members are (100 - 60) = 40% of all male faculty members.

Now, 40% of male faculty = 12

So, Number of total male faculty members = 12 x 100 / 40 = 30.

Again, male faculty members are (1 - 2/3) = 1/3 of all faculty members.

Or, 1/3 of all faculty members = 30

So, number of total faculty members = 30 x 3 = 90.

3578 . Two trains 105 meters and 90 meters long, run at the speeds of 45 km/h and 72 km/h respectively , in opposite directions on parallel tracks. The time which they take to cross each other , is :

A. 8 seconds
B. 7 seconds
C. 5 seconds
D. 6 seconds

View Answer	Favorite Question

Answer: Option D

Explanation:

Length of the 1st train = 105 m
Length of the 2nd train = 90 m
Relative speed of the trains,
= 45 + 72 = 117 kmph
= (117 × 5)/18
= 32.5 m/sec
Time taken to cross each other,
= (Length of 1st train + length of 2nd train)/ relative speed of the trains
∴ Time taken = 195/32.5
= 6 secs.

সমন্বিত ৬ (ব্যাংক) ও ২ টি আর্থিক প্রতিষ্ঠান - সিনিয়র অফিসার ১০.০৬.২০১৯

A. 36
B. 45
C. 48
D. 49
E. None

View Answer	Favorite Question

Answer: Option C

Explanation:

Probationary Officer | 31.03.2017 ||

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

View Answer	Favorite Question

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)

3581 . 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

View Answer	Favorite Question

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

3582 . 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

View Answer	Favorite Question

Answer: Option C

Explanation:

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

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

View Answer	Favorite Question

Answer: Option D

Explanation:

3584 . 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

View Answer	Favorite Question

Answer: Option A

Explanation:

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

A. 5 hours
B. 3 hours
C. 2.5 hours
D. 6 hours

View Answer	Favorite Question

Answer: Option C

Explanation:

3571 . Two pipes A and B can fill a tank in 6 hours and 4 hours respectively. If they are opened on alternate hours and if pipe A is opened first, in how many hours, the tank shall be full ?

3572 . Two planes leave the airport at the same time, Minutes later, plane A is 70 miles due north of the airport. How far apart are the two airplanes?

3573 . Two ships are sailing in the sea on the two sides of a lighthouse. The of elevation of the top of the lighthouse an observed from the two ships are 30 degree and 45 degree respectively. If the lighthouse is 100 m high, the distance between the two ships is-

3574 . Two sides of a triangle are 7 and 16. Which of the following is not the length of the third side?

3575 . Two tailors X and Y are paid a total of TK. 550 per week by their employer. If X is paid 120 percent of the amount paid to Y, how much is Y paid per week?

3576 . Two taps A and B can fill a tank in 5 hours and 20 hours respectively. If both the taps are open then due to a leakage, it took 30 minutes more to fill the tank. If the tank is full, how long will it take for the leakage alone to empty the tank ?

3577 . Two third of the faculty members of a department are female. Twelve of the male faculty members are unmarried, while 60% of them married. What is the total number of faculty members in the department?

3578 . Two trains 105 meters and 90 meters long, run at the speeds of 45 km/h and 72 km/h respectively , in opposite directions on parallel tracks. The time which they take to cross each other , is :

3579 . Two trains are moving in oppositions directions at 60 km/hr and km/hr. Their lengths are 1.10 km and 0.9 km respectively . The time taken by the slower train to cross the faster train in seconds is --

3580 . 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 :

3581 . 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?

3582 . 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 -

3583 . 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?

3584 . 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?

3585 . Two trucks 300 km away are travelling towards each other with a constant speed. Truck A is moving at a constant speed of 70 km/h while truck B is moving at a constant speed of 50 km/h. How long does it take for them to meet?

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