



 
Hi Kelly, I drew a cross section of the length of your pool (not to scale). $18 \times 4 = 72$ and hence the length of the bottom is $385  2\times 72 = 241$ feet. Likewise you can find the width of the bottom and then use the volume calculator at http://www.aquacalc.com/calculate/volumetruncatedpyramid to calculate the volume. Write back if you need additional help with this,  


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