Question

1 Calculate the total cost of running the following electrical devices in the month of September,
rate of 1 unit of electricity is 6.00.
(i) Electric heater of 1000 W for 5 hours daily.
(ii) Electric refrigerator of 400 W for 10 hours daily.​

Answer 1

Answer:

There are 30 days in september.

so cost of running electric heater is 1000×5 /1000 × 6

which is 30 rs

cost of running refrigerator is

400×10/1000 ×6 = 24 rs

so total cost is 30 rs +20rs = 54rs

Answer 2

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There are 30 days in september.

so cost of running electric heater is 1000×5 /1000 × 6

which is 30 rs

cost of running refrigerator is

400×10/1000 ×6 = 24 rs

so total cost is 30 rs +20rs = 54rs