Question

Devon knites at a constant rate. In 1 1/4 hours, Devon adds 10 inches to the scarf. find the unit rate

Answer 1

The unit rate is 8 inches/hour

Step-by-step explanation:

Given that;

- Devon knites at a constant rate.

- In 1 1/4 hours, Devon adds 10 inches to the scarf.

The rate can be calculated by dividing the amount of scarf added by the time taken;

`\text{rate}=\frac{Amount\text{ of scarf added}}{\text{Time taken}}`

Given;

`\begin{gathered} \text{Time taken }=1(1)/(4)=1.25\text{hours} \\ \text{Amount}=10\text{ inches} \end{gathered}`

Substituting we have;

`\begin{gathered} \text{rate}=\frac{10\text{ inches}}{1.25\text{ hours}} \\ \text{rate}=8\text{ inches/hour} \end{gathered}`

The unit rate is 8 inches/hour