Question

On a track of lenght 100km, the train covers first 30km with a constant speed of 30kmh-1 .What should be the speed of the train for the next 70km so that the average speed of the train remains 50kmh-1 for the entire trip?​

Answer 1

Answer:

This is your answer

Explanation:

Distance= 100km

Initial distance=30km

U=30kmh-1

Average speed= u+v/2

Putting values

50 = 30+ v/2

100= 30+v

v = 100-30

v = 70 km/h