4. A fan of power 50 W is used 8
hours per day and a TV of power
40 W is used 6 hours per day.
What is the energy consumption
of a fan and TV per month of 30
days?
640 Wh
O 12000 Wh
7200 Wh
19200 Wh
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Therefore the energy consumption of a fan and a TV per month of 30 days is 19200 Wh.
Given : A fan of power 50 W is used 8 hours per day and a TV of power 40 W is used 6 hours per day.
To find : The energy consumption of a fan and TV per month of 30 days.
solution : We know, energy = power × time taken
a/c to question, a fan of power 50 W is used 8 hours per day.
so total energy consumption of a fan per month of 30 days = 50 W × 8 hrs/day × 30 days
= 12000 Wh
similarly, a TV of power 40 W is used 6 hours per day.
so total energy consumption of a TV per month of 30 days = 40W × 6 hrs/day × 30 days
= 7200 Wh
then total energy consumption per month of 30 days = 12000 + 7200 = 19200 Wh
Therefore the energy consumption of a fan and a TV per month of 30 days is 19200 Wh.
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