SOLUTION: the surface area of a sphere is 86 pi r squared, what is the diameter? how do i find the answer to this question, I understand the formula for finding the surface area is SA=4pirsq

Question 988863: the surface area of a sphere is 86 pi r squared, what is the diameter? how do i find the answer to this question, I understand the formula for finding the surface area is SA=4pirsquared but Im at a loss as to how to find the area?

Answer by solver91311(24713) (Show Source): You can put this solution on YOUR website!

The surface area of a sphere is

. It cannot be

. It could be

in which case

or just

in which case

. But what you wrote is an absurdity, since 86 does not and never will equal 4.

The idea for your problem, if I don't miss my guess, is for you to solve either

for

and then recognize that the radius is half of the diameter.

John

My calculator said it, I believe it, that settles it

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