How long will it take a 60kg man to climb a height of 22m if he expended energy at a rate of 0.25kW. [g = ms-2]
-
A.
5.3s -
B.
34.5s -
C.
41.6s -
D.
52.8s
Correct Answer: Option D
Explanation
power = mgh
0.25 x 103 = (frac {60 times 10 times 22}{t})
t = 52.8 sec