What is the total surface area of a solid hemisphere of diameter ' $d$ '?\

Question

Professor PC Thomas Classes · Answer

(d): Total surface area of a hemisphere $=3 \pi r^{2}$\ $=3 \pi\left(\frac{d}{2}ight)^{2}$ $ [\because 2 r=d] $ 
$=\frac{3}{4} \pi d^{2}$\