A machine is supplied energy at a rate of 4000 W and does useful work at a rate of 3760 W. What is the efficiency of the machine? A)96 percent B)92 percent C)94 percent D)97percent

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Oct 21, 2017

Answer:

#94%# which is C

Explanation:

#% Efficiency=[("Work Done")/("Energy Supplied")]*100%#

Therefore #% Efficiency=[(3760cancel(W))/(4000cancel(W))]* 100%#=#94%#

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