b) A radio set of 60 Watts run for 20 minutes. How many units (kWh) of electrical energy isconsumed?
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Electrical Energy = (p * t) /1000
P = power of the machine
t = time in hours
Given informations
Power of the radio = 60 w
Time = 20 minutes
= 20/60 = 1/3 hours
ELctrical energy consumed by radio
= (60* (1/3)) / 1000
= (60/3) / 1000
= 20/1000
= 0.02 kWh
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