Question 1016053
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There is not sufficient information to solve this.
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For your pool:
Volume = pi x r^2 x h
1000ft^3=pi x (8ft)^2 x h
1000ft^3/(pi*64ft^2)=h
39.79 ft=h
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To the nearest foot, your pool is 40 feet deep.
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With no further information on your friends pool,
no other dimensions can be determined.