Question

train travelling at a speed of 90km/hr crosses a man standing on a platform in 8 sec. Find the time taken by the train to Cross the platform of length 250 .​

Answer 1

Step-by-step explanation:

Length of platform could be 250 m & not 250 k.m.

The man standing on a platform may be considered as a point the train is crossing.

Speed of train =( 90×1000) / (60×60) m/sec = 90000/3600 = 900 / 36= 100/4 = 25m/ sec

Distance train travels in 8 sec = 25 × 8 = 200 m

Lenagth of train = 200 m

Length of platform = 250 m

Total distance for train to fully cross = length of train + length of platform = 200 + 250 = 450 m

Time taken to cross platform fully = distance/speed = 450 / 25 = 18 sec