Question

A Rectangular paper of width $14$ cm is rolled along its width and a cylinder of radius $20$ cm is formed. Find the volume of the cylinder?

($\text{Take}$ $\pi =\frac{22}{7}$)

• A. $17500$ cu. cm
• B. $17600$ cu. cm
• C. $18000$ cu. cm
• D. $18560$ cu. cm

Answer 1

Answer: (B)

$17600$ cu. cm

A cylinder is formed by rolling a rectangle about its width.

Hence, the width of the paper becomes height of cylinder and radius of the cylinder is $20$ cm.
Height of the cylinder $=h=14$ cm,
radius $\left(r\right)=20$ cm.
Volume of the cylinder $V=\pi r^{2}h$
$=\frac{22}{7}\times 20\times 20\times 14$
$=17600$ cu. cm
Hence the volume of the cylinder is $17600$ cu. cm.