Q.24 A rectangular paper has dimensions 15 cm x 3 cm. It is revolved
around its width .Find the volume of the cylinder so obtained ?
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Step-by-step explanation:
when it is revolved along its width, then The cylinder' s height will be equal to the width of the rectangle. Also, the cylinder' s Radius will be equal to the length of the rectangle. ( ImaGine )
Then,
Volume of Cylinder
= Pie x R^2 x H
22/7 x. (15)^2. x 3
22/7 x 225. x 3
2121.42 cm3
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