Trains - Online Quiz



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Following quiz provides Multiple Choice Questions (MCQs) related to Trains. You will have to read all the given answers and click over the correct answer. If you are not sure about the answer then you can check the answer using Show Answer button. You can use Next Quiz button to check new set of questions in the quiz.

Questions and Answers

Q 1 - A train with a speed of 60 kmph crosses a pole in 30 seconds. The length of the train is

A - 500 m

B - 750 m

C - 900 m

D - 1000 m

Answer : A

Explanation

speed =  (60*5/18)m/sec  = 50/3 m/sec.
Length of the train = (50/3* 30)m = 500 m 

Q 2 - A train travelling at a speed of 30 m/sec crosses a platform 600 m long in 30 sec. The length of the train is?

A - 120 m

B - 150 m

C - 200 m

D - 300 m

Answer : D

Explanation

Let the length of the train be X m . then its speed =(600+x)/30 m/sec.
∴ (600+X)/30 =30 ⇒ 600+x =900 ⇒ x =300m

Q 3 - A train crosses a pole in 15 sec. while it crosses a 100m long platform in 25 sec. The length of the train is

A - 125 m

B - 135 m

C - 150 m

D - 175 m

Answer : C

Explanation

Let the length of the train be x metres. Then,
 x/15 =(100+x)/25  ⇒ 25x=1500+15x ⇒ 10x = 1500 ⇒ x = 150
Hence, the length  of the train is 150 m.

Q 4 - Two trains are running in opposite directions at 36kmph and 45kmph cross each other in 20 sec. if one train is 200m long, the length of the other train is

A - 144 m

B - 200 m

C - 240 m

D - 250 m

Answer : D

Explanation

let the length of the other train be x meters.
Sum of their length =(200+x)m
Relative speed =(36+45) kmph =81kmph = (81*5/18)m/sec. = 45/2 m/sec.
(200+x)/ (45/2) = 20  ⇒ 400 +2x = 900 ⇒ 2x = 500  ⇒ x = 250
∴  length of the other train is 250m 

Q 5 - Two trains A and B start running together from the same point in the same direction at 60 kmph and 72 kmph. If the length of each train is 240 m, how long will it take for the train B to cross train A ?

A - 1 min. 12 sec.

B - 1 min.24 sec.

C - 2 min. 12 sec.

D - 2 min. 24 sec.

Answer : D

Explanation

Relative speed =(72-60)kmph =12kmph =(12*5/18)m/sec = 10/3m/sec.
Total distance covered= (240+240)m= 480m
Required time =(480*3/10)sec. =144 sec.= 2 min.24 sec.

Q 6 - A train is running at the rate of 40kmph. A man is going in the same direction parallel to the train at 25kmph . If the train crosses the man in 48 sec. , the length of the train is

A - 50 m

B - 100 m

C - 150 m

D - 200 m

Answer : D

Explanation

relative speed = (40-25)kmph =15kmph  =(15*5/18) m/sec. =25/6 m/sec.
Length of the train = (25/6*48)m= 200 m.

Q 7 - A train X speeding with 120kmph cross another train Y, running in the same direction, in 2 min. If the length of the trains X and Y be 100 m and 200m respectively, What is the speed of train Y

A - 111 kmph

B - 123 kmph

C - 127 kmph

D - 129 kmph

Answer : A

Explanation

let the speed of train y be x km/hr.
Speed of x relative to y =(120-x) km/hr
=[ (120-x)*5/18]m/sec. = (600-5x)/18  m/sec.
300/ (600-5x)/18 =120 ⇒120 (600-5x) =5400
⇒ 600-5x =45 ⇒ 5x =555 ⇒ x =111
Speed of train y = 111km/hr 


aptitude_trains.htm

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