Question

A rectangular paper of width 7 cm is rolled along its width and a cylinder of radius 20 cm is formed. Find the volume of the cylinder.

Answer 1

Given  : A rectangular paper of width 14 cm is rolled along its width to form a cylinder.  

Height of cylinder =  h  =  7 cm = width of the rectangular paper  

And

Radius of cylinder ( Given ) =  r  = 20 cm  

And

we know Volume of cylinder  = π r^2 h , So

Volume of our given cylinder = 22/7 x 20 x 20 x 7  = 8800 cm^3    

Answer 2

Answer:

8800 cm²

Step-by-step explanation:

Given,

Width of rectangle = 7 cm

Width of rectangle = Height of cylinder

Height of Cylinder = 7 cm

Radius of Cylinder = 20 cm

Volume of Cylinder =

$\pi \: r {}^{2} h$

So,

$\frac{22}{7} \times 20^{2} \times 7$

= 22 × 400

= 8800 cm³