A family uses three 100W bulbs for 5 hours daily, calculate energy consumed in 20 days.
Answers
Explanation:
The family uses 300 watt bulbs in 5 hours.
they used in 1 =100 /5= 20watt.
they use in 24 hours or one day.
= 20×24= 480.
used in 20 days.
= 480×20watt
= 9600 watt.
Given:
Power of bulbs=100W
Time=5 hours daily
To find:
The energy that is consumed by bulbs in 20 days
Solution:
The energy that is consumed by bulbs in 20 days is 10kWh.
We can find the energy consumed by following the given process-
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
The power of bulbs=100W
Time for which the bulbs were used=5 hours/ day
Now we will 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
Therefore, the energy that is consumed by bulbs in 20 days is 10kWh.