Mensurationmedium · Past Paper
A solid cylinder has a total surface area of 462 sq. cm. Its curved surface area is one-third of its total surface area. Find the radius of the cylinder.
A7 cm
B3.5 cm
C14 cm
D10.5 cm
✓ Correct Answer: A — 7 cm
CSA = 1/3 * 462 = 154. 2 * Base Area = 462 - 154 = 308. Base Area = 154. πr² = 154 => r = 7 cm.
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