a train travels a distance of 480 km at a uniform speed . If the speed had been 8 km/hr less, then it would have taken 3 hrs more to cover the same distance . we need to find the speed of the train.
Let the original speed of the train be x km/hr.
Given, distance covered by the train = 480 km
∴ Original time taken by train hr
If the speed of the train had been 8 km/hr less, then
New speed of the train = (x – 8) km/hr
∴ New time taken by the train
Given, New time taken by train – Original time taken by train = 3
∴ x = 40 (Speed of the train cannot be negative)
Thus, the original speed of the train is 40 km/hr.