shannongail652
shannongail652 shannongail652
  • 25-11-2020
  • Mathematics
contestada

Find the total surface area of this cone,
Round to the nearest tenth.

6cm
4cm
[?] cm2

Find the total surface area of this cone Round to the nearest tenth 6cm 4cm cm2 class=

Respuesta :

quasarJose
quasarJose quasarJose
  • 25-11-2020

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 = [tex]\pi[/tex]r² + [tex]\pi[/tex]rL  

Now insert the parameters and solve

   Surface area = [tex]\pi[/tex]r(r + L )

    Surface area  =  [tex]\pi[/tex] x 4 (4 + 6) = 3.142 x 4 x 10  = 125.7cm²

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