Page 81 - WCS - Electrical
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           l = length, b = breadth and h = height

           Cylinder
           This is a prism whose top and bottom surfaces are equal and circular.

           Volume of cylinder =   r²h or   d²h






















           Curved area of cylinder = 2 rh unit²
           Total surface area of cylinder = 2 r(h+r) unit²
           r = Radius of base , d = Diameter of base
           h = Height of cylinder

           Hollow cylinder
           Hollow means empty space. In hollow cylinder there is an empty place. Water pipe is an example of hollow
           cylinder.
































           Volume of hollow cylinder   =   (R² - r²) h (or)
                                       =  (R + r) (R - r) h (or)

                                       =   (D² - d²) h unit³




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                                            CITS : WCS - Electrical - Exercise 6
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