Please tell the answer of this question

Dear Student

Mass of man = 60 kg
Number of steps = 30
Time taken = 40 s
Height of each step = 20 cm
Gravity due to Acceleration = 10 m/s^2

Total height of all steps = 30×20= 600 cm = 6m

Power = work done / time taken = mgh / t
Power = (60×10×6) / 40
Power = 90 W

Regards