A bus covers three successive 3 km stretches at speed of 10 km/hr, 20 km/hr and

Question

A bus covers three successive 3 km stretches at speed of 10 km/hr, 20 km/hr and 60 km/hr respectively. Its average speed over this distance is :

Options:

A . 30 km/hr

B . 25 km/hr

C . 18 km/hr

D . 10 km/hr

Answer: Option C

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