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CBSE Class 9 Answered

The radius of a right circular cylinder with curved surface area of 440 cm2 and an altitude of 5 cm is
Asked by swatipuspapatel | 17 Oct, 2020, 07:50: PM
answered-by-expert Expert Answer
Curved surface area of cylinder = 440 cm2 and height (h) = 5 cm
Curved surface area of cylinder = 2 πrh
440 cm squared equals 2 cross times 22 over 7 cross times straight r cross times 5 cm rightwards double arrow straight r equals fraction numerator 440 cross times 7 over denominator 2 cross times 22 cross times 5 end fraction cm rightwards double arrow straight r equals 14 space cm
Hence, radius is 14 cm.
Answered by Renu Varma | 19 Oct, 2020, 10:25: AM

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