Question

Mara built a walkway around a rectangle pool as shown. The walkway is the same width on all sides if the pool.What is the perimeter of the pool without the walkway?A. 120ft.B. 130ft.C. 110 ft.D. 90 ft.

Answer 1

We have the following diagram for the pool alone:

then, the perimeter is:

$\begin{gathered} P=2(15+30)=2(45)=90 \\ \Rightarrow P=90ft \end{gathered}$

therefore, the perimeter of the pool without the walkway is 90 ft