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One coolie takes 1 minute to raise a su...

One coolie takes 1 minute to raise a suitcase through a height of 2m but the second coolie takes 30 s to raise the same suitcase to the same height. The powers of two coolies are in the ratio':

A

`1:2`

B

`1:3`

C

`2:1`

D

`3:1`

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