The total surface area of a hemisphere is 462 cm2 .The diameter of this hemisphere is:A28 cmB21 cmC7 cmD14 cmAnswer: D. 14 cm Read Explanation: The total surface area of a hemisphere = 3πr² 3πr² = 462 3 × 22/7× r² = 462 r² = 49 r = 7 cm Diameter = 2r = 2 × 7 = 14 cmRead more in App