Question

The average horsepower required to raise a 150 kg drum to a height of 20 m in a time of 1 minute is.

a. 0.5 Hp

b. 1 Hp

c. 0.7 Hp

d. 1.2 Hp

Answer 1

$$P=\frac{mhg}{t}=\frac{150*20*9.8}{60}=490\:\rm W=0.7\: hp$$

Answer: c