Question

If thesurface area a sphere is 346.5cm then its radius

Answer 1

$let \: the \: radius \: of \: the \: sphere = r \: cm \\ given \: area \: of \: sphere \: = 346.5cm \\ \\ use \: formula \\ 4\pi. {r}^{2} = 346.5 \\ transpose \: the \: values \\ {r}^{2} = \frac{346.5 \times 7}{4 \times 22} \\ {r}^{2} = 27.5625 \\ r = \sqrt{27.5625 } \\ r = 5.25cm$