Question

Question no. 15
Answer fast it's very urgent...

Answer 1

Hi ,

Dimensions of the rectangle :

length ( l ) = 22 cm

breadth ( b ) = 12 cm

If it is rolled along its length to form a

cylinder ,

Dimensions of the cylinder :

height of the cylinder( h ) = breadth of the

rectangle = 12 cm

circumference of the base of the cylinder =

length of the rectangle = 22 cm

=> 2πr = 22 [ r is radius of the base ]

=> r = 22/( 2π )

r = 11/π cm

Therefore ,

volume of the cylinder ( V ) = πr²h

V = π ( 11/π )² × 12

V = π × ( 11 × 11 )/( π × π ) × 12

V = ( 11 × 11 × 12 )/π

V = ( 11 × 11 × 12 × 7 )/22

V = 462 cm³

I hope this helps you.

: )