Mathematics, 11.07.2019 09:30, andyromero
The surface area of a swimming pool is 210 square feet. what is the length d of the deep end (in feet)?
Answers: 1
![\bf \textit{area of a rectangle}\\\\ A=Lw~~ \begin{cases} L=length\\ w=width\\[-0.5em] \hrulefill\\ A=210\\ w=10\\ L=d+9 \end{cases}\implies 210=(d+9)(10)\implies \cfrac{210}{10}=d+9 \\\\\\ 21=d+9\implies 12=d](/tpl/images/0076/5937/139df.png)
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The surface area of a swimming pool is 210 square feet. what is the length d of the deep end (in fee...
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