Question

a 100m long train crosses a 300m long bridge at a speed of 90km/h. how much time will it take to cross the bridge completely?

Answer 1

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

d = (100 + 300) m = 400 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 = 400 / 25 = 16 s.

Answer 2

Explanation:

this is the correct answer which you need