Question

in a factory 4 bulbs of 100w each &5 fans of 110w each operate for 12 hours daily calculate the units of electricity consumed?

Answer 1

4 bulbs of 100 w = 400 watts ...1
5 fans of 110 w = 550 watts ....2

Now 1 + 2 : 950 watts
used for 12 hours so 950 x 12 = 11400 w

We know that 1000 w = 1kWH
Therefore, 11400 w = 11.4 kWH

So the answer is 11.4 units.

I hope this helps.

Answer 2

Let's see given data:
a factory 4 bulbs of 100w each.
5 fans of 110w each operate for 12 hours daily

We Know,
Total consumption:
⇒Power × Time
⇒950 × 12/1000      [4 × 100 + 5×110 = 950]
⇒11400/1000
⇒11.4 
So, units = 11.4