A car travels 60 km/h for the first half of a distance and 40 km/h for the second half. The average speed (km/h) is: MCQ with Answer and Explanation

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A car travels 60 km/h for the first half of a distance and 40 km/h for the second half. The average speed (km/h) is:

A. 52

B. 50

C. 45

D. 48

Answer: Option D

Solution (By JKSSB Mock Tests)

Harmonic mean of speeds: 2 / (1/60 + 1/40) = 2 / (5/120) = 240/5 = 48 km/h.

This question belongs to: Accountancy and Statistics Statistics

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