Mathematics, 30.09.2019 23:10 dsdlskds3880
What is the surface area of a sphere whose great circle has an area of 30 square yards
Answers: 1
![\bf \textit{area of a circle}\\\\ A=\pi r^2~~ \begin{cases} r=radius\\ \cline{1-1} A=30 \end{cases}\implies 30=\pi r^2\implies \boxed{\cfrac{30}{\pi }=r^2} \\\\[-0.35em] ~\dotfill\\\\ \textit{area of a sphere}\\\\ A=4\pi r^2\qquad \qquad A=4\pi \left( \boxed{\cfrac{30}{\pi }}\right)\implies A=120](/tpl/images/0277/9004/11f2c.png)
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