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Know-how in a house there are …

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Know-how in a house there are three fans each of hundred words used for 10 hours daily four tube lights each of 70 watt used for 8 hours daily and an AC of 2 kilowatt used for 5 hours daily calculate the electric bill for the month of June OS is charged as 7 rupees per unit

    • Posted by Naman Tayal 7 years, 5 months ago

    CBSE > Class 09 > Science
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