Question

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

Answer 1

Hi...

Let the speed of goods train be x km/hr.
Then, (50+x)×(5/18)=187.5/9

⇒ x= 25 km/hr


Hope this helps u!!

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