Question

A train covers a distance of 400 km with the speed of 40 km/hr and the next 600 km with the speed of 30 km/hr. Calculate the average speed of the train.

Answer 1

For first case,time=400/40=10 hr

For second case,time=600/30=20hr

Average speed=Total distance /Total time

Av. speed=(400+600)/(10+20)

=>1000/30=>33.33km/hr.

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