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A man $M_{1}$ of mass 80 kg runs up a staircase in 15 s. Another man $M_{2}$ also of mass 80 kg runs up the same staircase in 20 s. The ratio of the powers developed by them will be

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Correct option is B

Power P = WorkTime Work done by both will be same. Hence, P1P2=t2t1=2015=43

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A man M1 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

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A man $M_{1}$ of mass 80 kg runs up a staircase in 15 s. Another man $M_{2}$ also of mass 80 kg runs up the same staircase in 20 s. The ratio of the powers developed by them will be