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CBSE Class 9 Answered

The volume of right circular cylinder is 1694 cm3 and the radius of base is 7 cm. Find the curved surface area of the cylinder.
Asked by Topperlearning User | 13 Oct, 2017, 02:05: PM
answered-by-expert Expert Answer

Given: Volume of the right circular cylinder (V) = 1694 cm3

Radius of its base (r) = 7 cm.

Let h be the height of the cylinder.

 

begin mathsize 12px style straight V space equals space 1694 space cm cubed πr squared straight h space equals space 1694 straight h space equals space fraction numerator 1694 cross times 7 over denominator 22 cross times 7 cross times 7 end fraction space cm space equals space 11 space cm end style

 

Let C denote the curved surface area of the cylinder.

            

begin mathsize 12px style straight C space equals space 2 πrh straight C space equals space 2 cross times 22 over 7 cross times 7 cross times 11 straight C space equals space 484 space cm cubed end style

Answered by | 13 Oct, 2017, 04:05: PM

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