no he was right. (( (0.5/12)^2)/4)*3.1416*232 = 0.316 cuft

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For any given job you need slightly more than one can.

That's one of those rules that ought to have a name.

Then you throw away the rest because there's no good way to clean out the straw and as far as I know you can't buy another.

Actually My company does have a name for that. The POO rule. Purchase Over Optimal. Just like everything else order 15-20% more than needed, and hope like hell you can use the excess on the next job or it becomes fodder for the dump

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/3 of a cubic foot.
No your both wrong. He answered 2.5 ft^2. Your answer
is correct. 0.3166ft^2,
so your wrong to say he was right.

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Use the first straw on the second can as well, that way you have the second straw for another time.

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