Question

a train 150 metre long is running at 72 kilometre per hour it crosses a bridge in 13 seconds find the length of the bridge​

Answer 1

Answer:

Length of the bridge = 110 m

Step-by-step explanation:

Let the length of the bridge be x m.

Total distance covered by train in 13 sec = length of train + length of bridge = (150 + x) m

$speed \: of \: train \\ = 72 \: kmph \\ = 72 \times \frac{1000}{3600} \: mps \\ = 20 \: mps \\ \because \: distance = speed \times time \\ \therefore \: 150 + x = 20 \times 13 \\ \therefore \: 150 + x = 260 \\ \therefore \:x = 260 - 150 \\ \huge \red{ \boxed{\therefore \:x = 110 \: m}}$

mps means meter per second