Answers

2016-03-22T21:42:11+05:30
Energy cosumed by 3 bulbs=

40*3=120watts=0.12Kwatts=0.12units

energy consumed for 6h=0.12*6=0.72units

energy consumed in 30 days=0.72*30=21.6units

So,the energy comsumed in 30 days=21.6units
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