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A man M(1) of mass 80 kg runs up a stair...

A man `M_(1)` of mass `80 kg` runs up a staircase in `15 s`. Another man `M_(2)` also of mass `80 kg` runs up the same staircase in `20 s`. The ratio of the power development by then will be:

A

1

B

`4//3`

C

`16//9`

D

None of the above

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The correct Answer is:
B
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