Question

caluculate the electricity bill amount for janurary if 4 bulbs of 40W for 5 hrs,4 tubelights of 60W for 5 hrs, a TV of 100W for 6 hrs are used per day . the cost of per unit is RS 2.00

Answer 1

answer:

5200

Explanation:

4*40*2*5+4*60*2*5+100*2*6

Answer 2

Answer:

Energy used by light bulbs in one day = 40w*5*4 = 0.8 kwh

Energy used by tube lights in one day = 60w*5*4 = 1.2 kwh

Energy used by TV in one day = 100 w*6 = 0.6kwh

Energy used by washing machine in one day = 400w*3 = 1.2 kwh

Total energy used in one day = 0.8 + 0.6 + 1.2 + 1.2 = 3.8 kwh

Total energy used in 30 days ( because April has 30 days) = 3.8 x 30 = 114 kwh 1 kwh = 1 unit  

Cost per unit = Rs 1.8   So the bill for the entire month is 205.2 (114 x 1.8)

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