1.

An electric iron of power 2 kW is used for 3 hours. At Rs 5 per unit, the electricity bill will be ..........

Answer»

Rs 45
Rs 30
Rs 15
Rs 10

Solution :Electric energy consumed in 3 hours
`W = P xx t`
= 2 KW `xx` 3 H = 6 kWh = 6 unit
`:.` Cost of electric power consumed (electricity bill)
`5 xx 6 = Rs 30`


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