Question

The surface area of a solid hemisphere having diameter 2r is

• A. $\frac{2}{3}\pi r^2$
  
• B. $\frac{3}{2}\pi r^2$
  
• C. $3\pi r^2$
• D. $2\pi r^2$

Answer 1

The correct option is C $3\pi r^2$

Given that the diameter of the solid hemisphere is 2r.

∴ Radius of the solid hemisphere $=\frac{2r}{2}=r$
Thus, surface area of the solid hemisphere is $3\pi r^2$.
Hence, the correct answer is option (c).