Question

Hi...

How r u....

A share ,a cylindrical and a cone are of the same radius and same height.Find the ratio of their curved surface areas....

Answer 1

Hey mate!!.


Here's is ur answer _________________


___________________________

The hight of sphere is the diameter.
and the cone and cylinder have hight = 2r.

Then..

CSA of sphere = 4pi(r^2).
CSA of cylinder = 4pi( r^2).

CSA of cone = pi( rl).
where l =
$\sqrt[?]{?} ( r2 + h2) = \sqrt[?]{?}(r2 + (2r)2) = \sqrt[?]{?} (5r2) = r \sqrt[?]{?} 5$
CSA of cone =
$\pi \sqrt[?]{?} 5r2$
now ..
CSA of cylinder, sphere and cone..
4pi(r2) : 2pi (rh): pi(rl).


= 4pi( r2) : 4pi(r2) : pi( r2) root 5.

then.

4: 4: root 5.

Answer 2

1:3
hi my dear frnd
ans is 1:3
very fine and what about you