Question

Calculate the energy consumed by a 100 W refrigerator in 30 days , if it works for 16 hours everyday.

Answer 1

e=p*t
e=0.1kw*16
e=1.6kwh

1.6*30

38kwh

Answer 2

power = 100 W
           = 0.1kW
Time used = 30 days
                  = 24hrs x 30
                  = 720hrs
Energy = power x time taken
            = 0.1 x 720hrs
            = 72kW h
            = 72 'units'

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