An electric kettle rated at 2.2 kW works for 4 hours in a day. Calculate the number of units consumed by it in 20 days.

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Solution

Given: Power=P=2.2kw time=t=4hr Energy consumed=E=? **Formula: E=P*t =2.2x4=8.8kwH energy consumed for 20 days: 20x 8.8=176kwh ∴Electrical energy consumed for 20 days is 176kwH**

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