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(a) 1 : 2(b) 1 : 3(c) 2 : 1(d) 3 : 1
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their ratio should be 1:2
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Answer:
D) 1:2
Explanation:
t₁ = 1 minute (Given)
t₂ = 30 seconds (Given)
Height = 2m (Given)
Power = rate of doing the work is described as -
Power = work done/time taken
Power P = w / t
P₁ / P₂ = t₂ / t₁
= 30s / 1 minute
= 30s / 60s
= 1/2
Thus, the powers of two coolies are in the ratio of 1:2
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