Question

A building has the following electrical appliances:
1 ) 15 tube light of 15 Walt each running for 8 hours per day .
2) 5 fans of 75 Walt each running for 8 hours per day .
3) A 0.75 HP motor running for 3 hours per day .
4) A fridge consuming 150 Walt's running full day .
Calculate the total using of energy consumed for the month of July . If the cost of electrical energy for first 50 unit is Rs 2.50 for second 150 unit is Rs 4.30 and for rest unit is Rs 5.30 then calculate the builling amount the month of July .

Answer 1

Answer:

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Answer 2

Question: The question is incomplete, the entire question is:-

In a residence, 4 tube lights: each of them of 40 W are operated daily for 5 hours, and 3 fans: each of 120 W are operated daily for 4 hours. Calculate the electricity bill at Rs. 5 per unit for September month.

Answer:

The electricity bill for the month of September= Rs.336

Explanation:

Power consumed by 1 tube of light=40W

Power consumed by 4 tube lights=4×40=160W=0.16kW

Energy consumed by 4 tube lights each day =0.16 kW×5 h=0.8kWh

Power consumed by 1 fan =120W

Power consumed by 3 fans =3×120=360W=0.36kW

Energy consumed by 3 fans each day =0.36 kW×4 h=1.44kWh

Total electrical energy consumed per day =0.8+1.44=2.24kWh

∴ Total number of units consumed per day =2.24units

Cost of one unit=Rs.5/unit

Number of days in the month of September=30 days

∴ Electricity bill for the month of September=2.24 units×5 Rs./unit×30=Rs.336

SPJ3