Question

A sewing machine uses 1.6kWh of electricity in one day. If electricity costs 9p per unit, what is the total cost in pence of using the sewing machine that day? Give your answer to 3 significant figures.

Answer 1

`\huge\boxed{\sf 1.6\ units = 14.4p}`

Step-by-step explanation:

Since,

1 kWh = 1 unit

So,

1.6 kWh = 1.6 units

If,

1 unit = 9p

1.6 units = 9p × 1.6

1.6 units = 14.4p

`\rule[225]{225}{2}`