Electricity Bills


For better understanding, let's break this down further. Let us say you are charged N20 Kw/Hr.


Here are approximate power ratings of some domestic appliances:


Energy Lamp: 20w

Flat screen TV: 200w

Ceiling Fan: 200w

Big Fridge: 400w

Iron: 1,000w

Big Freezer: 800w

A. C.: 1,200w


Now, let us say in a day, a family leaves 5 energy lamps on for 10 hours, Big freezer on for 10 hours, TV for 5 hours and you use your Iron for 2 hours; here is what you will pay for that day.


Energy consumed is calculated as follows:

Lamp is 5*20=100w or 0.1Kw Charge for 10 hours is 20*10*0.1=N20


Freezer is 800= 800/1,000= 0.8Kw so Charge for 10 hours is 0.8*20*10= N160


TV is 200=200/1,000=0.2Kw So charge for 5 hours is 0.2*5*20= N20


Iron is 1,000 = 1,000/1000=1Kw So the charge for 2 hours is 1*20*2= N40.


We then add together as 20+160+20+40 =N240 for that day.


Now you know the secret!


I hope the Maths is simple enough?

Questions please!



@ Tunde Y. Salihu, 2016




0 #1 profile 2018-11-01 14:28
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