Question

answer this.............

Answer 1

$\text{For the solid hemisphere}\\ \\ \text{Volume = Surface area}\\ \\ \Rightarrow \frac{2}{3} \pi r^3 = 2 \pi r^2 + \pi r^2 \\ \\ \Rightarrow \frac{2}{3} \pi r^3 = 3 \pi r^2 \\ \\ \Rightarrow \frac{ {r}^{3} }{ {r}^{2} } = \frac{3\pi}{ \frac{2\pi}{3} } \\ \\ \Rightarrow r = 3\pi \times \frac{3}{2 \pi} \\ \\ \Rightarrow r = \frac{9}{2} \\ \\ \Rightarrow diamter = \frac{9}{2} \times 2 = 9 \\ \\ \boxed{ \text{diameter = 9 units}}$

Answer 2

Hey mate.....

Hope it helps!!!!