Question

a washing machine having a power rating of 350 watt operates for 5 hours a day. Calculate the cost of electrical energy to operate it for a month of 30 days . the rate of electrical energy is rs 4.20 per kWh
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Answer 1

Explanation:

Electrical energy,

<br> Power,

<br>

<br>

<br> And, Time,

hours <br>

<br> Now, putting these values of P and t in the formula, <br>

<br> We get:

<br>

<br> Thus, the electrical energy consumed by the refrigerator in a month of 30 days is 105 kilowatt-hours. <br> Now, Cost of 1 kWh of electricity = Rs. 3.40 <br> So, Cost of 105 kWh of electricity = Rs.

<br> = Rs. 357

Answer 2

Answer:

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