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A house wife uses a 100 W bulb 8 h a day , and an electric heater of 300 W for 4 h a day. The total cost for the month of June at the rate of 0.05 rupee per unit will be

a)

Rs 20

b)

Rs 25

c)

Rs 30

d)

Rs 30 paise 50

Question ID - 151266 :-

A house wife uses a 100 W bulb 8 h a day , and an electric heater of 300 W for 4 h a day. The total cost for the month of June at the rate of 0.05 rupee per unit will be

a)

Rs 20

b)

Rs 25

c)

Rs 30

d)

Rs 30 paise 50

1 Answer
5876 Votes
3537
Answer Key : (c) -

(c)

Since the unit of electrical energy is kilowatt hour (kWh),

So total number of units consumed is

(Because June has 30 days)

Total cost  Rs.

Next Question :

The depletion layer in the -  junction region is caused by

a)

Drift of holes

b)

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c)

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d)

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