Question

train hundred metre long Crosses a of Bridge 400 metre long at 72 kilometre per hour how long will the train take to cross the bridge​

Answer 1

Step-by-step explanation:

total distance to cover = 400 + 100 = 500 m

speed = 5÷18 × 72 = 20 m/s

time = distance ÷ speed = 500 ÷ 20 = 25 seconds ANS

Answer 2

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

d = (100 + 400) m = 500 m

The speed of the train is,

v = 72 km/h = 72 × 5 / 18 = 20 m/s

Hence the time taken to cross the bridge is,

t = 500 / 20 = 25 s.