Question

A train 100 m long is moving with the velocity of 72 km/hr. Find the time it takes to cross the bridge which is 2 km long?

Answer 1

Answer:

=>total distance=100+2000=2100m

=>velocity=72 km/h=(72 x 1000)/3600=20 m/s

=> speed=distance/time

=>•°• time=2100/20= 105 sec

Explanation:

Answer 2

Answer:

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=>total distance=100+1000=1100m

=>velocity=72 km/h=(72 x 1000)/3600=20 m/s

=> speed=distance/time

=>•°• time=1100/20= 55 sec

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