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

Answer 1

Answer:

Step-by-step explanation:

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 = πr  

2

h

=  

7

22

​  

×20×20×14

=17600cm  

3

 

∴ Volume of the cylinder = 17600cm  

2

Answer 2

Answer:

Before we solve,

A cylinder is formed by rolling a rectangle about its width.Hence the width of the paper becomes height and radius of the cylinder is 30 cm.

Height of the cylinder=h=14 cm

Radius=r=20 cm

Volume of the cylinder=V= πr²h

When we solve,

$\sf{ \frac{22}{7} \times 20 \times 20 \times 14 = 17600 \: {cm}^{3} }$

Hence the volume of the cylinder is 17600 cm³.