If a student’s speed is 60 km/h for half the distance and 40 km/h for the other half, the average speed is: MCQ with Answer and Explanation

If a student’s speed is 60 km/h for half the distance and 40 km/h for the other half, the average speed is:
A. 45 km/h
B. 50 km/h
C. 52 km/h
D. 48 km/h
Answer: Option D
Solution (By JKExamLibrary)
Harmonic mean of 60 and 40 = 2/(1/60 + 1/40) = 48 km/h.

This question belongs to: Accountancy and Statistics Statistics

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