Question

Question 18 I need the steps the number in red is the answer

Answer 1

Given the image in the question tab, it can be seen that the Total Surface Area of the cone is required.

For a cone with length 13.4 cm, diameter 12cm, TSA =?.

Recall that;

$\begin{gathered} Radius\text{ = }\frac{Diameter}{2}^{} \\ \text{Radius = }\frac{12}{2}=6\operatorname{cm} \end{gathered}$

After knowing the length and the radius, we compute the formula for Total Surface Area of a cone which is:

$\begin{gathered} \pi r(l+r) \\ \end{gathered}$

We then go ahead to calculate the Total Surface Area(TSA):

$\begin{gathered} \pi\times6(6+13.4) \\ 6\pi(19.4) \\ \text{TSA}=365.68 \end{gathered}$

Hence, it can be seen from the image that the Total Surface Area of the cone is 365.68cm^2