A man of weight 60 kg.wt takes a body of mass 15 kg at a height of 10 m on a building in 3 minutes. The efficiency of man is - a) 10% b) 20% c)30% d) 40%
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Given, weight = 60kg, mass = 15 kg, height = 10m.
Work done = m * g * h
= 15 * 10 * 10
= 1500
Work done = (M + m) * g * h
= (60 + 15) * 10 * 10
= 7500
Efficiency of man is = 1500/7500 * 100
= 20%.
Hope this helps!
Work done = m * g * h
= 15 * 10 * 10
= 1500
Work done = (M + m) * g * h
= (60 + 15) * 10 * 10
= 7500
Efficiency of man is = 1500/7500 * 100
= 20%.
Hope this helps!
siddhartharao77:
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