Question

1/3 of a certain journey is covered at the rate of 25 km/h , 1/4 at the rate of 30 km/h and the rest of 50 km/h.What is the average speed for the
whole journey?

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Answer 1

Answer:

Let distance be 120 km Hence 30 km is covered by @25 kmph and 40 km covered by @30 kmph and rest 50 km has been covered @50 kmph

Now,

average=120totaltimetaken=1203025+4030+5050=3600106=180053km/h