Science, asked by mkhushi471, 8 months ago

31.
An electric refrigerator rated 400 W is used for 8 hours a day. An electric iron
box rated 750 W is used for 2 hours a day. Calculate the cost of using these
appliances for 30 days, if the cost of 1 kWh is Rs. 3/-.
(its 10th class question) ​

Answers

Answered by Anonymous
1

Energy of one day = Power × Time

=400W×8h

=3.2KWh

Energy of 30 days =3.2KWh×30

=96KWh

So, cost of the energy =96×3

=Rs.288

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