A sphere, a cylinder and a cone are of the same radius and same height. Find the ratio of their curved surface.

Explanation

To find the ratio of the curved surface areas of a sphere, a cylinder, and a cone with the same radius (r) and height (h), we will use the formulas for the curved surface areas of each shape.

### Step-by-Step Solution:

1. **Curved Surface Area of the Sphere:**
The formula for the curved surface area (CSA) of a sphere is given by:
\[
\text{CSA}_{\text{sphere}} = 4\pi r^2
...