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The energy consumed by four devices in $10$ hours having the power of $500 w$ is [[1]] kilowatt-hour.

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Detailed Solution

The energy consumed by four devices in

10

hours having the power of

500 w

20

kilowatt-hour.
Here

p = 500 W, t = 10 hrs

Then by the relation

E = p \times t

where E represents energy consumed by the device.
Therefore,

E = 500 \times 10 = 5000 Wh = 5 kWh

Since the number of device is four then the total energy

= 4 \times 5 = 20 kWh

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