Question

Vikas covered a certain distance by bike. If he covers 40% of the distance at 40 km/h, 50% of the distance at 25 km/h and the remaining 10% distance at 10 km/h. Find his average speed over the whole distance.

A 26 km/h
B 28 km/h
C 25 km/h
D 30 km/h
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