Question

if a house there are four tubelight each of 40 watt for 5 hours and 3 fans ratting 100 watt runs for 4 hours there is a LED TV which consume 35 watt and it run for 3 hours calculate the electric bill for 1 months if the rate of 1 unit is rupees 3.50

Answer 1

electrical energy consumed=(4*40*5)+(3*100*4)+(35*3)=800+1200+105
                                               =2105 watt hour=2.105 kwhr OR 2.105 units
∴cost for 1 month=30days*3.50*2.105units
                             =rupees 221.025

i hope it helps!!