Find the total surface area of this cone. Leave your answer in terms of 7.
12cm
5cm
SA = [?]7 cm2
Hint: Surface Area of a Cone = tre + B
Where e = slant height, and B = area of the base

Step-by-step explanation:

Total surface area of a cone is given by the expression,

SA = πrl + B

Here, r = Radius of the circular base

l = slant height

B = Surface area of the base

Surface area of the circular base = πr²

                                                       = π(5)²

                                                       = 25π cm²

Slant height 'AC' =

                            =

                            =

                            =  13 cm

Substitute the values in the expression of surface area,

SA = π(5)(13) + 25π

     = 65π + 25π

     = 90π cm²

Therefore, SA = 90π cm² will be the answer.

i just took the test, the correct answer is .. 31.5 in.

step-by-step explanation:

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