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A boy walks to his school at a distance...

A boy walks to his school at a distance of 6km with constant speed of 2.5 kmph and walks back with a constant speed of 4 kmph. His average speed for round trip expressed in kmph is

A

`24//13`

B

`40//13`

C

3

D

`1//2`

Text Solution

Verified by Experts

The correct Answer is:
B
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