the volume of a cylinder 3 cm high and having base area 8 sq. cm is
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Step-by-step explanation:
The base area and volume of a solid right circular cylinder are 13.86 sq. cm and 69.3 cu. cm respectively. What is its height and curved surface area?
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Satya Parkash Sud
Answered September 27
Base area of the solid right circular cylinder = 13.86 cm²
Volume of the cylinder = 69.3 cm³
Height h of the right circular cylinder = (Volume of the cylinder)/ area of the base = 69.3/13.86 = 5 cm
Area of the two bases = 13.86 × 2 = 27.72 cm²
Area of the base (π r²) = 13.86
So the radius of the right cylinder = (13.86/π)½ = 4.41½ = 2.1 cm
Now curved surface area of a right circular cylinder = 2 π r h = 2 × π × 2.1 × 5 = 65. 97 cm²
Total surface area of the right circular cylinder = curved surface area + area of two circular ends = 65.97 cm² + 27.72 cm² = 93.69 cm²