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A boy rides his bicycle 10km at an avera...

A boy rides his bicycle 10km at an average speed of 12 km/hr and again travels 12km at an average speed of 10km/hr. His average speed for the entire trip is approximately.

A

10.4km/hr

B

10.8km/hr

C

11.0 km/hr

D

12.2 km/hr

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The correct Answer is:
B
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