Question

A light bulb consumes 960 watt-hours per day. How long does it take to consume 5520 watt-hours?

Answer 1

The light bulb consumes

`960\text{watt}-\text{hour in one day}`

To calculate how long 5520 watt-hours would last, we will use the formula below

`\text{time}=\frac{Number\text{ of watts hour to be used}}{\text{Number of watts hour per day}}`
`\begin{gathered} \text{Time}=(5520)/(960) \\ \text{Time}=5(3)/(4)days \end{gathered}`

Which can be converted as

`\begin{gathered} 5(3)/(4)days=5+(3)/(4)*24 \\ 5(3)/(4)days=5\text{days 18 hours} \end{gathered}`

Hence,

It will take 5 days and 18 hours to consume 5,520 watt-hours