Maharashtra Class 8 Answered

Find the area of sheet of a cylinder whose one side is open and diameter is 28cm ang height is 20cm and find the perfect area of sheet whose lidd height is 2cm.

Asked by faheemgotmail | 13 Mar, 2019, 00:26: AM

Expert Answer

left parenthesis i right parenthesis F o r space a space c y l i n d e r colon space D i a m e t e r space equals space 28 space c m space rightwards double arrow space R a d i u s space left parenthesis r right parenthesis equals space fraction numerator D i a m e t e r over denominator 2 end fraction equals 28 over 2 equals 14 space c m H e i g h t space left parenthesis h right parenthesis equals space 20 space c m A r e a space o f space t h e space s h e e t space r e q u i r e d space t o space m a k e space t h e space c y l i n d e r equals space B a s e space a r e a space plus space L. S. A equals space πr squared plus space 2 πrh equals space 196 straight pi space plus space 560 straight pi equals space 756 straight pi equals space 756 cross times 22 over 7 equals space 2376 space c m squared left parenthesis i i right parenthesis space D i m e n s i o n s space o f space t h e space l i d colon R a d i u s space left parenthesis r right parenthesis space equals 14 space c m H e i g h t space left parenthesis H right parenthesis space equals space 2 space c m A r e a space o f space t h e space s h e e t space equals space B a s e space a r e a space plus space L. S. A equals space πr squared plus space 2 πrh equals space 196 straight pi space plus 56 straight pi equals space 252 straight pi equals space 252 cross times 22 over 7 equals space 792 space cm squared

Answered by Renu Varma | 13 Mar, 2019, 09:58: AM

Maharashtra Class 8 Answered

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Maharashtra Class 8 Answered

Concept Videos

Area of Quadrilaterals

Mensuration I

Area of Rectilinear Figures

Perimeter and Area of Circles

Frequency distribution

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