Question

If a train 150 m  long takes 30 sec  to cross a bridge 500 m  long then the time taken to cross a plat form 370 m  long is​

Answer 1

Answer:

Given :

Length of the train = 150 m

Time = 30 secs

Length of the bridge = 500m

Distance covered = Length of the train + Length of the bridge

Distance = (150 + 500) m

= 650 m

Therefore , Speed = Distance/Time

Speed = 650/30 metre per second

Speed = 65/3 metre per second.

Now,

Speed = 65/3 metre per second

Distance covered = Length of the train + Length of the platform

Distance = (150 + 370) m

= 470 m

Therefore, Time = Distance/ speed

= 470 / (65/3)

= (470 × 3)/ 65

= 21.7 seconds. ( Ans )