Question

Calculate the electrical energy in Kwh consumed in a month, in a house using 2 bulbs of 100W, 2 fans of 60W, if the bulbs and fans are used for 10 hours each day.  If the cost per unit is Rs.2.10, Calculate the cost per month.


answers :- RS.201.60​

Answer 1

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GIVEN:-

Power of each bulb = 100 W

power of each fan = 60W

time = 10 hour each day

FIND:-

Electrical energy in Kwh??

The cost per month??

SOLUTION:-

power of two bulbs = 2 * 100. = 200W

power of two fans = 2 * 60 = 120 W

so,

total power = 200 + 120= 320 W

or,

total power = 320/1000 KW = 0.32 kW

time consumption in a month = 10 h * 30= 300 hour

so,

total energy consumed= Total power * time duration

                                      = 0.32 kW * 300 h

                                      = 0.32 * 300/100

                                      = 32 * 3

                                      = 96 kWh

If the cost per unit is Rs.2.10, then

the cost per month= Electric energy × cost per unit

                                =$2.1 \times 96$

                                =201.6

So,the cost per month= Rs.201.6

Answer 2

Answer:

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Explanation:

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