Homework Help: math

Posted by audrey on Tuesday, May 17, 2011 at 8:53pm.

There is a water reservoir beneath a circular garden to supply a fountain in the garden. The reservoir has a 26-inch diameter. The garden has a 12-foot diameter. How much of the garden doesn't contain the water reservoir?

I have no idea how to do this please explain!!!

math - Ms. Sue, Tuesday, May 17, 2011 at 8:56pm
Find the areas of both circles. I suggest you use 72 inches instead for the radius of the garden.

A = pi * r^2
math - audrey, Tuesday, May 17, 2011 at 9:24pm
i am still confused so you find the areas of both circles, but whats the formula? pi times r times 2? please help me!!!!!
math - audrey, Tuesday, May 17, 2011 at 9:39pm
wait so after you find the areas you subtract the reservoir from the garden to get the answer?
math - Ms. Sue, Tuesday, May 17, 2011 at 9:42pm
A - pi * radius squared

Yes -- subtract the area of the reservoir from the area of the garden.
math - Jen, Monday, December 31, 2012 at 1:08pm
The answer is417.62 after finding the area of both objects and subtracting them

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