Question

Plz help me with this question

A man runs a staircase of 55 steps in 11 seconds. The height of each step is 20 cm and his weight is 50 kg.[Take g = 10m/s^2 ]
1) Calculate the work done by Person
2) Calculate the Power of Person

Suggestion from My side 
The height is in cm convert it and then solve it

Plz hellp me fast with fully explained solution

You can give me in attachment
but with explaination

Answer 1

Total length of steps = 65×20= 1300 cm
velocity = distance/time
=13/12
force = mg
=62 × 10. ( g = 10)
= 620
power = force × velocity.
= 620 × 13/12
= 671.6 watt.
Total length of steps = 65×20= 1300 cm
velocity = distance/time
=13/12
force = mg
=62 × 10. ( g = 10)
= 620
power = force × velocity.
= 620 × 13/12
= 671.6 watt.