an object of mass 20kg will be rise when an engine of 75% of efficiency is supplied with 60000j of heat
given w=mgh g=10m\s
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The efficiency is 75%and hence he will be able to use only 45000j and rest other. Energy will be lost
Thus 45000 = 20*10*h
And hence we get is 225m
Thus 45000 = 20*10*h
And hence we get is 225m
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