Question

An electric appliances of rating 300W is used 5 hours per day in the month of march find the number of unit consumed

Answer 1

Answer:

1 unit.= 1000 watt hour

300 wat × 5 hr × 30 = 45000 watt.hr

45000 wat .hr = 4.5 units

Answer 2

Electric appliances will consume energy of 46.5 unit

Explanation:

We have given rating of the electric appliances = 300 Watt

It is used for 5 hour in a day for a month of march

Number of days in march = 31 days

So total number of hours in month of march = 31×5 = 155 hours

So total energy = $=300\times 155=46500watt-hour$

As $1kWh=1000Watt-hour$

So $46500Watt-hour=46.5kWh$

As 1 unit of energy is equal to 1 kWh

So electric appliances will consume energy of 46.5 unit

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