5. What is the total surface area of a hemispher
(8) Aur (6) ar (c) 2rr²
(d) 31r
6. If the radius of a sphere is doubled, then what is the ratio of their surfa
area?
(a) 1:2 (6) 2:1 (c) 1:4
(d) 4:1
. Two right circular cones of equal curved surface areas have slant height:
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Step-by-step explanation:
Total surface area of hollow hemisphere = 2πr^2
Total surface area of solid hemisphere = 3π^2
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