Q. 85.0( 2 Votes )

A cylinder of same height and radius is placed on the top of a hemisphere. Find the curved surface area of the shape if the length of the shape is 7 cm.

Answer :


Given, cylinder of same height and radius is placed on the top of a hemisphere.


Also, length of the shape is 7 cm


r + r = 7


r = 3.5 cm


Curved surface area of a hemisphere = 2πr2


Curved surface area of a cylinder = 2πr2


Total surface area of the shape = 4πr2


Total surface area of the shape = 4 × (22/7) × (3.5)2


Total surface area of the shape = 154 cm2


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