A cylinder of height 77cm is made by melting a cuboid with dimension 22cm,16 cm and 11cm find curved surface area for the cylinder.
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Volume of cuboid=length×Breadth×Height
Volume of cuboid=22×16×11=3872 cm^3
Volume of cylinder=πr^2h
Substitute π as 22/7 and height as 77:
3872=r^2(77)(22/7)
r^2=3872÷242=16
r=√16=4 cm
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Curved surface area of the cylinder = 1936 cm^2
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