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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 =w/t = (mgh)/t`
`P_1/P_2 =(m_1gh)/t_1 xxt_2/(m_2gh)=60/50 xx11/12 =11/10`
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