Question

An electric current 100 w opprate for 1 hrs in aday what will be the cost in 30 days if cost of one unit is 5

Answer 1

Given :-

• Power , P = 100W

• Time used in per day = 1 hour

• Total no.of days used = 30 days

• Cost of 1 unit = Rs 5

To Find:-

• Total cost

Solution:-

According to the Question

No. of hours appliances used in 30 days = 30/1 = 30 hours.

Now we know that ,

• Energy Consumed = Power×time

• E = Pt

Substitute the value we get

→ E = 100×30

→ E = 3000 J.

∴ Energy Consumed by the appliance is 3000 J.

Now ,

1 unit = 3.6×10⁶ J

∴ 3000/3.6×10⁶ = 0.00083 Unit

Cost of 1 unit = Rs 5

∴ Cost of 0.00083 Unit = 0.00083×5 = Rs0.00415