Question

The ratio between the speed of two trains is 7:8. If the second train runs 400 kms. In 5 hours, thr speed of the first train is

Answer 1

The speed of the second train is 400 /  5 = 80 kmph. The ratio of the speeds is 7:8.

ie., 7 : 8 = x : 80

ie., x = 80 * 7 / 8

x = 70 kmph