Question

The power of bulb is 1000 W and it runs for 1 hour daily. If the cost of 1 unit of electric energy is rs.7. find the bill for 30 days

Answer 1

E = pxt

E = 100/1000 x 1

E = o.1 kwh in one day

In 30 days

E = 0.1 x 30

E= 3

cost = 3 x 7

cost is Rs. 21 /-

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