Question

6.
An electric refrigerator rated 400w is used
for showes
day. An electric icon box reated
2 hours a day
day calculate
cost of using these appliances for 30 day
if the
Lost of 1kwh is Rs 3​

Answer 1

Answer:

Explanation:

Given :

cost of one kilowatt = Rs 3

refrigerator rated 400 watt used for =  8 hours a day

and, an electric iron box rated 750 watt used for = 2 hours a day

To find :

The cost of using the appliances for 30 days .

Solution :

energy used in 1 day by refrigerator = 0.4 * 8 = 3.2 kwh

energy used in 1 day by iron box = 0.75 * 2 = 1.5 kwh

total energy used in a day = 3.2 + 1.5 = 4.7 kwh

energy used in 30 days = 4.7 * 30 = 141 kwh

cost of 141 kwh = 141 * 3 = Rs 423

The cost of using the appliances for 30 days is Rs 423 .

Answer 2

Answer:

(400/2×60×60) ×30×3=.....

Thus, u can calculate

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