Question

Find the total surface area of this cone,

Answer 1

Answer:

125.7cm²

Step-by-step explanation:

Given parameters:

Slant height, L = 6cm

Base radius  = 4cm

Unknown:

Total surface area = ?

Solution:

To find the total surface area, we use the expression;

      Surface area = $\pi$r² + $\pi$rL  

Now insert the parameters and solve

   Surface area = $\pi$r(r + L )

    Surface area  =  $\pi$ x 4 (4 + 6) = 3.142 x 4 x 10  = 125.7cm²