Question 174228
What would the volume of the region between two cylinders be if the largerst cylinder radius is 12 and the smaller radius is 9.  Both of the cylinders have a height of 20 inches.
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Volume of larger : (pi)*12^2*20 cu. in
Volume of inner  : (pi)*9^2*20 cu. in
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Volume between = (pi)*20[12^2-9^2) cu in
= 1260pi cu in
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Cheers,
Stan H.