Question

A television of 65w a refrigerator of 1.2kw and electric kettle of 650w and 10 lamps of 40w each are connected in series in a house .How much will it cost the house keeper to switch on all the appliances for 24 hrs if the cost of electricity is 15k/kw hour

Answer 1

Explanation:

firstly we convert all power in to same unit watt convert into killo watt so for tv 0.065kw,freez 1.2kw, electric kettle 650kw, lamp if 1 lamp power is 40 w so for 10 400 w then 0.4 kw all add together 650+1.2+0.065+0.4=651.665 kw and for electricity cunsuption for 24 hr so 651.665×24=15639.96 kwh and 1 unit = 1kwh so 15639.96×15=234599.4 dollar

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