Question

In a house, $3$ fans of $200$ watt each are used for $12$ hours per day, a TV of $500$ watt is used for $10$ hours per day, $4$ bulbs of $60$ watt each are used for $8$ hours per day. Find the electric bill for the month of $30$ days if the cost of one unit is Rs. $2.20$.

Answer 1

Power of consumption of 3 fans $=3\times 200\times 12=7.2kWh$

Power comsuption of 4 bulbs $=4\times 60\times 8=1.92kWh$

Power comsuption of television = $500\times 10=5kWh$

Total comsuption of power per day = $7.2+1.92+5=14.12kWh$

Power consuption in 30 days $=14.12\times 30=423.6kWh$

Bill for time period of 30 days $=423.6\times 2.20=Rs.931.92$.