Question

a rectangular paper of width 14 centimetre is rolled along its width and a cylinder of radius 20 cm is formed find its volume

Answer 1

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

Height of cylinder =  h  =  14 cm = width of the rectangular paper

And
Radius of cylinder ( Given ) =  r  = 20 cm

And
we know Volume of cylinder  = 
$\pi {r}^{2} h$
So

Volume of our given cylinder =
$\frac{22}{7} \times 20 \times 20 \times 14$
$= > 17600 {cm}^{3}$