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An electric lamp marked 60 Omega-220 V i...

An electric lamp marked `60 Omega-220 V` is used on an average 5 hours a day in a month of 30 days. Cost of electric power consumed at the rate of Rs. 2 per unit is

A

Rs. 30

B

Rs. 18

C

Rs. 9

D

Rs. 27.

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