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 power development by then will be:

Options

A. (a) `1`
B. (b) `4/3`
C. (c) `16/9`
D. (d) None of the above

Answer

B

Explanation

Power P=Work/Time
Work done by both will be same.
Hence, `P_1/P_2=t_2/t_1=20/15=4/3`