Answers

2016-03-05T16:46:19+05:30
power = energy / time
100 = energy / 240
energy = 24000 J
therefore energy consumed in 15 days = 15*24000 = 360000 J

i hope it helps................ 
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2016-03-05T21:19:22+05:30
Power=energy /time
100=energy/4hrs
100*240=energy (4*60 mins)
energy =24000
so in 15 days
24000*15=
360000
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