Question

A household has a TV set marked at 10 W, an AC at 20 W and 3 tube lights at 1 W each. If energy consumption is charged at Rs.1.50 per unit find the total bill to be paid for 30 days. Given the appliances are used 2 hour daily.
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Answer 1

Power consumption of TV set = 10W

Total time = (2×30) = 60 hours

Total consumption = (60×10) = 600 W

Power consumption of AC = 20W

Total time = 60 hours

Total consumption = (60×20)= 1200W

Power consumption of tube light = (1×3) W = 3W

Total time = 60 hours

Total consumption = ( 60×3) = 180W

Grand total consumption = (600+1200+180) W = 1980 W =1.98 KW = 1.98 unit

Bill = (1.5× 1.98) = 2.97 rupees (answer)