Question

Which of false?
(a) Volume of a hollow $\mathrm{sphere}=\frac{4}{3}\mathrm{\pi }(R^3-r^3)$
(b) Volume of a $\mathrm{hemisphere}=\frac{2}{3}\pi R^3$
(c) Total surface area of a hemisphere = 3 πR²
(d) Curved surface area of a hemisphere = πR²

Answer 1

(d) Curved surface area of a hemisphere = πR²

Curved surface area of hemisphere is =$2\mathrm{\pi }{R}^2,\mathrm{where}R\mathrm{is}\mathrm{the}\mathrm{radius}\mathrm{of}\mathrm{hemisphere}$