# Math Ms.Sue???

posted by Ellie_Fan

Find the surface area of the cone. Use 3.14 for pi. The diameter is 8in and the height is 7in please help asap!! And thank you for your time. Ms.Sue?

1. Ms. Sue

http://www.mathopenref.com/conearea.html

2. Reiny

You will need the slant height s , the hypotenuse
s^2 = 4^2 + 6^2 = √52

surface area = πrs + (πr^2) , using the formula on Ms Sue's page
= 4√52π + 16π

You didn't state if the circular base is to be included, so ....

3. Jordan

649.98 square feet

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