A body is lifted by a man to height of 1...

A body is lifted by a man to height of 1 m in 30 s .Another man lifts the same mass to the same height in 60 s. The work done by then are in the ratio :

A

`1 : 2`

B

`1 : 1`

C

`2 :1`

D

`4 : 1`

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The correct Answer is:

b

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