Question

Calculate the electricity bill amount for a month of 30 days,if the following devices are used as specified: (a) 2 bulbs of 40 W for 6 hours. (b) 2 tubelights of 50 W for 8 hours. (c) A TV of 120 W for 6 hours.​

Answer 1

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Electricity consumed= power×time

2 bulbs of 40 W used = 6hrs

Electricity consumed=2×40=80W

80×6=480=0.48 kWh

2 tubelights of 50W used= 8hrs

Electricity consumed=2×50=100W

100×8=800=0.8kWh

Tv of 120W used= 6 hrs

Electricity consumed=1×120=120W

120×6=720=0.72kWh

Electricity consumed in 30 days= (0.48+ 0.8+ 0.72) kWh×30

=2×30=60units

60 units are consumed in 30 days.

Price of unit is not given in your question, so to find the bill of 60units you can multiply the cost of 1 unit by 60.

For example, cost of 1 unit is ₹20

20×60=₹1200

So bill will be of ₹1200 when 60nits are consumed.

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