Physics
Grade-9
Easy
Question
A certain appliance requires 2,141 watts. How much would it cost to run the appliance for a total of 27 minutes at a cost of Rs 12 per kWh?
- Rs 11.52
- Rs 12
- Rs 11
- Rs 10.52
Hint:
=Power
The correct answer is: Rs 11.52
- Power =
- power=
- so total cost =4.75 *12=Rs 57
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