Answers

2016-03-17T19:26:05+05:30
No. of  devices = 4
Time = 10 hours
power = 500W = 500/1000=0.5 kW

Total energy consumed = 4 × 0.5 × 10
                                        = 20 kWh
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2016-03-18T09:52:48+05:30
Time = 10 hours
Power= 500 watts
= 500/1000
= 0.5 kilowatt
No. of devices = 4
Energy consumed= P×t
= 4×0.5×10
= 20 kilowatt hour
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