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A 60 kg man runs up a staircase in 12 se...

A 60 kg man runs up a staircase in 12 seconds while 50 kg man runs up the same staircase in 11, seconds, the ratio of the rate of doing their work is

A

`6:5`

B

`12:11`

C

`11:10`

D

`10:11`

Text Solution

Verified by Experts

The correct Answer is:
C
`P= (mgh)/(t) rArr (P_(1))/(P_(2)) = (m_(1))/(m_(2)) xx (t_(2))/(t_(1))` (As h= constant)
`therefore (P_(1))/(P_(2))= (60)/(50) xx (11)/(12)= (11)/(10)`
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