Arecord for stair climbing was achieved by a man who raced up the 1600 steps of the empire state building to a height of 320 m in 10 min 59 sec. if his mass was 75 kg, what power did he generate (in both watts and horsepower) while climbing?

Power will be 356.90 watt  

Explanation:

We have given total number of steps in the stair = 1600

And height id the stair h = 320 m

Acceleration due to gravity

Mass is given m = 75 kg

So work done in climbing the stairs

Time is given t = 10 min 59 sec

So time

We know that power is rate of doing work

So power

So power will be 356.90 watt

the answer is b ) square root of 5