12. It takes 20 s for a girl A to climb up the
stairs while girl B takes 15 s for the same job.
Hote. Compare : (i) the work done and (ii) the power
spent by them.
Ans. (i) 1 : 1 (ii) 3:4
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Answer:
the answer for Ur question is 3:4
Explanation:
just divide (cancel) 20 : 15
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