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Power

A man M 1 of ...

Question

A man $M_{1}$ of mass 80 kg runs up a staircase in 15 s. Another man M₂ also of mass 80 kg runs up the same staircase in 20 s. The ratio of the powers developed by them will be

A

1

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B

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C

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D

None of these

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Solution

The correct option is B

Power P = $\frac{W o r k}{T i m e}$

Hence, $\frac{P_{1}}{P_{2}}$ = $\frac{t_{2}}{t_{1}}$ = $\frac{20}{15}$ = $\frac{4}{3}$

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