Question

A family uses three 100W bulbs for 5 hours daily, calculate energy consumed in 20 days.
please fast
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Answer 1

Answer:

30 KW

Explanation:

no. of bulbs=3, power=300w,Time=5hours. E=P x T. E=3x100x5 =1500. no of hours power used daily for 20days E=1500x20=150000. Energy in kw=30000/1000 =30Kw

Answer 2

Given,

Power of bulbs=100W

Time=5 hours daily

To find,

The energy that is consumed by bulbs in 20 days

Solution,

We can find the energy consumed by,

We know that the energy consumed is the product of power and time, divided by 1000.

So, energy consumed by the bulbs=Power of bulbs × Time/1000

Here it is given that the power of bulbs=100W

Time for using those bulbs in a day=5 hours/ day

Now we can calculate the energy consumed in 1 day by putting the values,

Energy consumed in a day=100×5/1000

                                           =5/10=1/2

                                           =0.5 kWh

Now, the energy consumed in 20 days can be obtained by multiplying the energy consumed in 1 day by 20.

So, the energy is consumed in 20 days=0.5×20

                                                                =10 kWh

Hence, the total energy consumed in 20 days is 10kWh.