Question

what does it mean by 85% efficiency of a simple machine ?

Answer 1

85 percent efficiency mean that it produces 85% of electricity out of the total amount

it also means that it is highly efficient and usefull

for eg.-100W of electricity is input in a machine and it gives 85% of electricity

Answer 2

hlo mate.

here is your answer.
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85% efficiency means that it produces 85 %electricity out of total amount.
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hope it helps you.

thanks