Question

A man sitting on a train travelling at the rate of 50km/hr observes that it takes 9seconds for goods train travelling in the opposite direction to pass him .if the goods train is 187.5m long find speed

Answer 1

Relative speed =280/9 m / sec = (280/9*18/5) kmph = 112 kmph.

Speed of goods train = (112 - 50) kmph = 62 kmph.

Answer 2

Answer:

25 km/hr

Explanation:

Rate of the travelling goods train = 50km/hr (Given)

Time taken by the goods train to travel opposite = 9sec (Given)

Length of the goods train = 187.5cm (Given)

Let the speed of the goods train be = x km/hr

Then, the relative speed = 187.5/9

Thus, using the equation -  

= (50+x) × (5/18) = 187.5/9

On solving -  

=  x = 25 km/hr

Hence, the speed of the train is 25 km/hr.