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 - How much time will a train 171 m long take to cross a bridge 229 m long , if it is running at a speed of 45 kmph?

A - 40 sec

B - 35 sec

C - 32 sec

D - 30 sec

Answer : C

Explanation

Speed = (45*5/18)m/sec = 25/2 m/sec.
Required time =(171+229)/(25/2) sec. = (400*2/25)sec. =32 sec.

Q 3 - A train 100 m long moving at a speed of 50km/hr crosses a train 120m long coming from opposite side on parallel tracks in 6 sec. The speed of the second train is

A - 132 kmph

B - 82 kmph

C - 60 kmph

D - 50 kmph

Answer : B

Explanation

let the speed of the second  train be x kmph.
Their relative speed = (50+x) kmph ={ (50+x)* 5/18) m/sec.
Sum of their lengths = (100+120)m =220 m
220/ [(50+x)*5/18] = 6   ⇒30 (50+x)= 3960
⇒ 30x  =(3960-1500) = 2460
X = 82
Speed of the second train = 82 kmph.

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 - A train moving at the rate of 36 km per hour crosses a standing man in 10 sec. It will cross a platform 55m long, in

A - 11/2 sec

B - 6 sec

C - 15/2 sec

D - 31/2 sec

Answer : D

Explanation

speed of the train = (36*5/18)m/sec. =10m/sec.
Let the length of the second train be x meters. Then, x/10 =10 ⇒ x =100m
Time taken by the train to cross the platform = (100+55)/10 sec.=31/2 sec.

Q 6 - Two trains are running at 40 km/hr and 20 km/hr respectively in the same direction. Fast train completely passes a man sitting in the slower train in 5 sec.What is the length of the faster train?

A - 23 m

B - 34 m

C - 27 m

D - 250/9 m

Answer : D

Explanation

Relative speed = (40-20)km/hr = 20km/hr =(20*5/18)m/sec. =50/9 m/sec.
Length of faster train = distance travelled by it in 5 sec. at 50/9 m/sec.
=(50/9*5)m = 250/9 m 

Q 7 - Two man running in opposite directions cross a man standing on the platform in 27 sec. and 17 sec. respectively and they cross each other in 23 seconds. The ratio of their speeds is

A - 1:3

B - 3:2

C - 3:4

D - None of these

Answer : B

Explanation

Let the speed of the two trains be x m/sec. and y m/sec.
Length of the first train =(27x)m
Length of the second train = (17y)m
(27x+17y)/(x+y) = 23  ⇒ 27x+17y = 23x+23 y 
⇒4x=6y ⇒ 2x=3y ⇒ x/y 3/2 
Ratio of their speed = 3:2


aptitude_trains.htm

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