Question

a boy of mass 50 kg climbs up a staircase in 10 seconds and other boys B of mass 60 kg climbs of the same staircase in 15 seconds the ratio of the power developed by the boys a and b is
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Answer 1

Answer:

Pa=mgh/t

Pa=50×10×h/10=50h

Pb=mgh/t

Pb=60×10×h/15=40h

Pa/Pb=50h:40h

Answer 2

Answer:

power of a = work/time

= 50×g×h/10

power of b=60×g×h/15

ratio=50×g×h/10:60×g×h/15

=50×g×h×15/10×60×g×h

=5:4 hope it helps you

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