Question

Sally is creating a flower bed that wraps around the corner of her house. She will put edging around the flower bed 10 feet from the corner of the house in all directions as shown below.Which is the BEST estimate of the number of feet of edging that Sally will need?A. 24B. 43C. 48D. 63

Answer 1

apparently she will use 3/4 of the circumference, therefore:

`\begin{gathered} C=(3)/(4)\cdot(2\pi r) \\ \text{where:} \\ r=10ft \\ C=(3)/(4)(2\pi(10)) \\ C=(3)/(4)(20\pi) \\ C=15\pi\approx48ft \end{gathered}`