Discussion of Question with ID = 020 under Problems-on-Trains

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Question

A train is moving at a speed of 63m/s. It takes 8 seconds to cross a jeep that is travelling in the opposite direction at a speed of 70m/s. What is the length of the train?

A

1064 meters.

B

1065 meters.

C

1063 meters.

D

1066 meters.

Soln.
Ans: a

The distance to be covered is equal to the length of the train. This distance has to be covered at a net relative speed equal to the sums of the speeds of the jeep and the train, so v = 63 + 70 = 133. The length of the train will be time × speed = $8 × 133$ = 1064meters.


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