A cyclist covers a distance of 15 km at 12 km/h and another 15 km at 10 km/h. What is his average speed for the whole jo...

Type: MCQ • Marks: 1

A cyclist covers a distance of 15 km at 12 km/h and another 15 km at 10 km/h. What is his average speed for the whole journey?

A. 1) 10.5

B. 2) 10.91

C. 3) 11.2

D. 4) 11.5

Explanation

Harmonic mean = 2*12*10 / (12+10) = 240 / 22 = 10.91 km/h.

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