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A 60 W bulb is switched on for 5 hours daily. If the cost of electricity is Rs. 3 per unit, calculate the bill for the month of April.

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Energy consumed by the bulb daily
`=60 W xx 5 h `
` = 300 W ` h
Energy consumed in the month of April is `300 W h xx 30`
`=9000 W h `
`=9 k W h `
cost `= 9 K W h xx Rs. 3 = Rs. 27`

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