<PRE><B>Question 525648</B>
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If you mean 40 &lt;i&gt;&lt;b&gt;cubic&lt;/b&gt;&lt;/i&gt; yards, then divide 1080 (40 times 27, the number of cubic feet in 40 cubic yards) by *[tex \Large 25\pi] (the area of the circular base if the &lt;i&gt;&lt;b&gt;diameter&lt;/b&gt;&lt;/i&gt; is 10 feet), or by *[tex \Large 100\pi] (the area of the circular base if the  &lt;i&gt;&lt;b&gt;radius&lt;/b&gt;&lt;/i&gt; is 10 feet.), or by *[tex \Large \frac{25}{\pi}] (the area of the circular base if the  &lt;i&gt;&lt;b&gt;circumference&lt;/b&gt;&lt;/i&gt; is 10 feet).


John
*[tex \LARGE e^{i\pi} + 1 = 0]
My calculator said it, I believe it, that settles it
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