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19 October, 23:59

A 200 watt t. v. is used for 20 hours in a week. If it is used for four weeks then what is cost of electricity if rate is 5rs/kwh

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  1. 20 October, 00:28
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    80rs

    Explanation:

    you can calculate

    t_total = 20h/week * 4 weeks = 80 hours

    200w = 0,2kw

    cost = 5rs/kwh * 0,2kw * 80h = 80rs
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