One coolie takes 1 minute to raise a suitcase through a height of 2 m 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 of

Options

(a) 1 : 2
(b) 1 : 3
(c) 2 : 1
(d) 3 : 1

Correct Answer:

1 : 2

Explanation:

power P = w / t
P₁ / P₂ = t₂ / t₁ = 30s / 1 minute = 30s / 60s = 1/2
(t₁ = 1 minute ; t₂ = 30 second given)