Question

A train 100 m long crosses a platform 125 m long in 15 sec. Find the speed of the train?

Answer 1

Answer:

54 m/s

Explanation:

Formula: Distance = Speed * Time

Distance = 100 + 125 = 225 m

Time = 15 s

Speed = 225/15 m/s

           = 54 m/s

Answer 2

Given: Length of a train = 100m

           Length of a platform = 125 m

           Time = 15 seconds

To find: Speed of the train

Solution:

Distance covered by the train will be equal to the length of the train and the platform the train crosses.

Therefore, the distance will be the sum of both the length = ( 100 + 125 )m = 225m

Time is taken to cross the platform = 15 seconds.

The speed of the train will be the distance covered by the train per unit time.

Speed = Distance covered / Time taken

            = 225/15 = 15 m/s

Therefore, the speed of the train will be 15 m/s.

• Speed - Speed is the distance covered by the body per unit of time. It is a scalar quantity.