A rectangular paper of width 21 cm is rolled along its width and a cylinder of radius 10 cm is formed. Find the curved surface area of the cylinder.
17600 cm²
1320 cm²
6600 cm²
1420 cm²
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Answer -: A rectangular paper of width 14 c is rolled along its width to form a cylinder.
Height of cylinder = h= 14 cm= width of rectangular paper.
And
Radius of cylinder = r= 20 cm.
Volume of the cylinder = πr2h
=722×20×20×14
=17600cm3
∴ Volume of the cylinder = 17600cm2
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