Question

What is the surface area of this cone? Use A = 3.14 and round your answer to the nearest hundredth. 9 cm 4 cm

Answer 1

Given:

The radius = 4 cm, the slant height = 9 cm.

To find:

The surface area of the cone.

Solution:

It is known that the surface area of the cone is given by:

`SA=\pi r(l+r)`

For the given question, we have r = 4 cm and l = 9 cm. So, the surface area is:

`\begin{gathered} SA=3.14*4(9+4) \\ =12.56(13) \\ =163.28cm^2 \end{gathered}`

Thus, the surface area of 163.28 square centimeters.