Question

A vessel is in the form of a hollow hemisphere. The diameter of the hemisphere is $14cm$. Find the inner surface area of the vessel.

Answer 1

Diameter of hemisphere $=14$

Radius of hemisphere $=\frac{14}{2}=7$

Inner surface area $==2\pi r^2$

$A=2\pi {\left(7\right)}^{2}A=2\times \frac{22}{7}\times 7\times 7A=308{cm}^2$