Question

A train 150 m long running at a speed of 60 km/hour takes 30 seconds to cross a bridge. What is the length of the bridge?

• A. 200 m
• B. 500 m
• C. 3.5 km
• D. 350 m

Answer 1

Answer:

D. 350 m

speed = 60km/hr = 60 × 5/18 m/s time = 30 S Length of the train = 150 m Let the length of the bridge = X Total distance = 150 + X Speed = distance / time 60 × 5/18 = (150 + X)/30 150 + X = 60 × 5/18 × 30 = 500 X = 500 - 150 = 350 m