Question
A man travels 120 km at 40 km/h and returns the same
distance at 60 km/h. What is his average speed for the whole journey?Solution
ATQ, For equal distances, average speed = 2xy / (x + y) = 2 x 40 x 60 / (40 + 60) = 4800/100 = 48 km/h Hence, the correct answer is 48 km/h.
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