Question

A train of length 25 metre long is cross a straight Bridge of length 425m. if train is moving with 90 km/h of constant velocity then time it will take to cross the bridge is​

Answer 1

Answer:

0.005 hrs

Explanation:

if we consider for the head of the train the distance it has to cover is 425m but if we consider the length of the train too then it has to travel 425 + 25(length of train) to cross...so total distance is 450m now simply convert it into km and divide it by speed as time = distance/speed

Answer 2

Total distance required for the train to cross the bridge is,

d = (25 + 425) m = 450 m

The speed of the train is,

v = 90 km/h = 90 × 5 / 18 = 25 m/s

Hence the time taken to cross the bridge is,

t = 450 / 25 = 18 s.