Question

The total surface area of a hemisphere of radius r is

(a) ${\mathrm{\pi r}}^2$

(b) 2${\mathrm{\pi r}}^2$

(c) 3${\mathrm{\pi r}}^2$

(d) 4${\mathrm{\pi r}}^2$

Answer 1

The curved surface area of a hemisphere of radius r is. So, the total surface area of a hemisphere will be the sum of the curved surface area and the area of the base.

Total surface area of a hemisphere of radius r =

Therefore, the correct option is (c)