Question

Ration between speeds of 2 train is 7:8 if the second train runs 400 kms in 4 hours then the speed of the first train

Answer 1

Answer:

87.5km/hr

Explanation:

speed of second train= distance/time = 400/4 = 100km/hr

ratio = 7:8 = 7x:8x

8x = 100

x = 100/8

x = 12.5

speed of first train = 7x = 7*12.5 = 87.5km/hr