A toy is in the form of a cone of radius 3.5 cm mounted on a hemisphere of same radius. The total height of the toy is 15.5 cm. Find the total surface area of the toy.

Explanation

To find the total surface area of the toy which consists of a cone mounted on a hemisphere, we will follow these steps:

### Step 1: Understand the dimensions of the toy
- The radius (r) of both the cone and the hemisphere is given as 3.5 cm.
- The total height of the toy is 15.5 cm.
- The height of the cone (h) can be calculated by subtracting the radius of the hemisphere from the total height:
\[
h = \text{Total height} - \text{Radius} = 15.5 \, \text{cm} - 3.5 \, \text{cm} = 12 \, \text{cm}
...