Question
The surface area of a sphere is $5544\ cm^2,$ find its diameter.
✓
Answer
Surface area of a sphere is $5544\ cm^2$
$4\pi\text{r}^2=5544$
$4\times3.14\times(\text{r})^2=5544$
$\text{r}^2=\frac{5544\times7}{88}$
$\text{r}=\sqrt{21\text{cm}\times21\text{cm}}$
$\text{r}=21\ cm$
Diameter $= 2($radius$)$
$= 2(21) = 42 \ cm$
$4\pi\text{r}^2=5544$
$4\times3.14\times(\text{r})^2=5544$
$\text{r}^2=\frac{5544\times7}{88}$
$\text{r}=\sqrt{21\text{cm}\times21\text{cm}}$
$\text{r}=21\ cm$
Diameter $= 2($radius$)$
$= 2(21) = 42 \ cm$
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