One coolie takes 1 min to raise a box through a height 2m. Another takes 30 m/s for the same job and does the same amount of work. Which one of these two has a greater power?

Explanation

Both the coolies do the same amount of work, so they spend the same amount of energy.
`W=p_(1)t_(1)=p_(2)t_(2)`
`(p_(2))/(p_(1))=(t_(1))/(t_(2))=(60sec)/(30sec)=2`
(or) `p_(2)=2p_(1)`
`2^(nd)` coolie has greater power.