A fridge rated $1000 W$ and a television rated $500 W$ is used in a house for 8 hours daily for 30 days. What will be the cost of operating them if the unit cost of electricity (in kWhr) is $5 r u p e e s$ ?

R s . 1200

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R s . 1500

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R s . 1800

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R s . 2000

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Solution

The correct option is C $R s . 1800$
Given:
Rating ot fridge $= 1000 W = 1.0 k W$
Rating of television $= 500 W = 0.5 k W$
So the rating of combination $= 1.5 k W$
Duration of daily use $= 8 h o u r s$ ,
Number of days $= 30$ .
Cost per kWhr is $R s . 5$ .
Electricity used in operating both the appliances for a month $= 1.5 \times 8 \times 30 k W h r$
$= 360 k W h r$
Cost of operation $= 360 \times 5 = R s . 1800$

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A fridge rated 1000 W and a television rated 500 W is used in a house for 8 hours daily for 30 days. What will be the cost of operating them if the unit cost of electricity (in kWhr) is 5 rupees?

A fridge rated $1000 W$ and a television rated $500 W$ is used in a house for 8 hours daily for 30 days. What will be the cost of operating them if the unit cost of electricity (in kWhr) is $5 r u p e e s$ ?