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Calculate the electrical energy consumed when a bulb of 40 W is used for 12.5 h every day for 30 days

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Given,` P = 40 W, t = 12.5 h`
Number of days = 30
Electric energy E= ?
`E = P xx t xx` number of days
`(40)/(1000) xx 12.5 xx 30 = 15 ` kWh
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