In a house 4 bulbs of 100 watt each are lighted for 5 hours daily, 2 fans of 50 watt each are used for 10 hours daily and a refrigerator of 1.00 kW is used for half an hour daily. Calculate the total energy consumed in the month of January and its cost at the rate of ₹ 3.60 per kWh.

Answers 2

Answer:

390.6/-

Explanation:

Hope my working are clear

Given,

4 bulbs of 100 watts lighted for 5 hours daily.

2 fans of 50 watts are used for 10 hours daily.

1 refrigerator of 1 kW is used for 1 hour daily.

To find,

The total energy consumed in the month of January and its cost at the rate of ₹ 3.60 per kWh.

Solution,

we know that,

Energy = Power × Time

energy consumed by the bulbs in a day = 0.1 × 4 × 5 = 2 kWh

energy consumed by the fans in a day = 0.5 × 2 × 10 = 1 kWh

energy consumed by the refrigerator in a day = 1/2 × 1×1 = 0.5 kWh

∴ total energy consumed in a day = 3.5 kWh

Number of days in January = 31

∴ Total power consumed in January = 3.5 × 31 kWh = 108.5 kWh

∴ Total cost = ₹ 108.5 × 3.6 = ₹ 390.6