A person covers half of his journey at 40 km/h, one-third at 60 km/h and rest of journey at 30 km/h. Find his average speed for the whole journey.?

Question

Accepted Answer

Let total distance be 100 km. Then, Average = 100/[ (50/40) + (30/60) + (20/30)] = 100/( 5/4 + 1/2 + 2/3) = 100/[(15 + 6 + 8)/12] = (100 x 12)/29 = 42.35

A person covers half of his journey at 40 km/h, one-third at 60 km/h and rest of journey at 30 km/h. Find his average speed for the whole journey.?

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