Question

A train passes over a 200m long bridge in 10s . The length of the train is 100m. What is the speed?

Answer 1

Answer: The bridge is 200 m long and the train is 100 m long. Therefore, the entire train must travel 300 m to clear the bridge and it does so in 10 sec. So its speed is 300 m per 10 sec or 30 m per sec or 108 km/hr.

Explanation: Therefore 108 kph is the answer

Answer 2

Answer: 30m/s

Explanation:

Length of bridge= 200m

Length of train= 100m

Total time taken= 10s

Total distance covered= 100m+200m

=300m.

Speed of train= Distance/Time

V=S/T

V= 300m/10s

V= 30m/s.

Already explained in the image.

Hope you understand.......