A rectangular piece of paper is 22 cm. long and 10 cm. wide. A cylinder is formed by rolling the paper along its length. Find the volume of the cylinder.
Explanation:
Cylinder is formed by rolling the paper along its length.
Hence, circumference of cylinder = 22
∴ 2πr = 22
∴ r = 7/2
∴ Volume of cylinder = πr2h = 227 × 722 × 10
= 385 cm3
Hence, option (d).
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