Question

A colour TV rated 150 w operates 6 hours per day what is the cost of energy to create it for 30 days at rupees 5.50per unit

Answer 1

The mathematical relationship between one electrical unit and electrical watt is;

1 unit = 1kilo-watt

[1 unit = 1000 watt]

So, according to the data mentioned in the question,the total amount of used electricity in one day is;

=150×6

= 900 w

And the total amount of used electricity in one month or 30 days will be;

=90×30

=2700 w

So,

1000 w = 1 unit

1 w = 1/1000 unit

2700w = 2700/1000 unit = 2.7 unit

Now the total cost will be;

= (2.7×5.5)₹

= ₹ 14.85 (answer)