Question

A train travels 360km at a uniform speed. If the speed had been 5km/hr more, it would have taken 1 hour less for the same journey. Find the speed of the train.

Answer 1

let the usual speed of train be x km/hr,

Then the increased speed of the train is = (x + 5) km/hr

Time taken by the train under usual speed to cover 360km = hr

Time taken by the train under increased speed to cover 360 km =hr

Therefore,

Since the speed of the train can never be negative

Hence, the original speed of the train is 40 km/hr.