Question

A bulb of 100 watt in used for 6hrs daily.How many units (Kwh) of electrical energy are consumed in one month?​

Answer 1

Answer:

First of all you should understand that what is one unit ?

So let me make you understand that

1 UNIT = 1 kwh ( one kilo watt hour)

Where kilo = 1000

It simply means that if you have a 100 watt bulb and you make on it for 10 hour it consume one unit of power

100watt bulb × 10 hours = 1000 watt- hour = 1 kwh = 1 unit

Now in your case you have a 60 watt bulb and you turn it on for 5 hour per day

Let us calculate energy consumed by a bulb per day

60 watt × 5 hour = 300 watt-hour

You can see here energy consumed by a bulb per day is 300 watt-hour

Now you continued this process till 30 day

Simply multiply it by 30

300watt-hour × 30 = 9000watt-hour

Now as we discuss before 1 unit = 1000 watt-hour

So 9000watt-hour = 9 unit

FINAL ANSWER IS 9 UNIT