The area of the base of a right circular cylinder is 81 pi .if its height is 14cm,find the curved surface of the cylinder.
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Area of Base of cylinder = 81 π
Base of cylinder is circle
Area of circle = π r² = 81π
⇒ r² = 81
⇒ r = 9 cm
Curve surface Area of cylinder = 2πrh
⇒ 2 × π × 9 × 14
⇒ 252π
⇒ 252 × 22/7 = 792 cm²
Hence curved surface of the cylinder = 792 cm²
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