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A-refrigerator-is-rated-20-watts-of-electricity-which-cost-5k-per-kwh-what-is-the-cost-of-operation-for-20-days-




Question Number 6495 by sanusihammed last updated on 29/Jun/16
A refrigerator is rated 20 watts of electricity which  cost 5k per kwh , what is the cost of operation for 20 days.
$${A}\:{refrigerator}\:{is}\:{rated}\:\mathrm{20}\:{watts}\:{of}\:{electricity}\:{which} \\ $$$${cost}\:\mathrm{5}{k}\:{per}\:{kwh}\:,\:{what}\:{is}\:{the}\:{cost}\:{of}\:{operation}\:{for}\:\mathrm{20}\:{days}. \\ $$
Answered by sandy_suhendra last updated on 30/Jun/16
20 days×24 hour×20 watts=9600 wh=9.6kwh  it′s cost=9.6×5k=48k
$$\mathrm{20}\:{days}×\mathrm{24}\:{hour}×\mathrm{20}\:{watts}=\mathrm{9600}\:{wh}=\mathrm{9}.\mathrm{6}{kwh} \\ $$$${it}'{s}\:{cost}=\mathrm{9}.\mathrm{6}×\mathrm{5}{k}=\mathrm{48}{k} \\ $$

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