Question

find the radius of the base of a right circular cylinder whose curved surface area is two third of the sum of the surface areas of two circular faces height of the cylinder is given to be 15 CM​

Answer 1

$\huge\red{Hey \ Dude}$

Here Is Your answer

Let the radius of the cylinder be r cm.

Height Of the cylinder is 15 cm.

Curved area of the cylinder =

$\frac{2}{3} {some \: of \: the \: surface \: areas \: of \: two \: cirular \: face}$

Now See the Attchment which I attach On This answer..

So , The radius of the Cylinder=22.5cm

Hope its help you

Answer 2

Answer:

The radius of the base is 22.5cm

Step-by-step explanation:

Given that the CSA is 2/3 of  $2\pi r^{2}$  where r is the radius of the cylinder base.

The height of the cylinder is 15cm.

We know that the Curved Surface Area is $2\pi rh$.

From the question we get, $2\pi rh = 4/3\pi r^{2}$ which on substituting the value of the height will give us 22.5cm