A boy of mass 50 kg runs up a staircase of 45 steps in 9 sec . If the height of each step of the staircase is 15cm then find power of the boy ?

No of stairs is 45 Height of each is 15 cm Total height is 45*15=675cm=6.75 m M = 50kg. F = mg= 50*10=500 W= f*s =500*6.75=3375 J P= W/t =3375/9 = 375 watt. Pls like...... The answer....

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