Question 1208729
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I don't know why you would change the given description in feet to inches -- it won't change the solution, but it will mean working with larger numbers, which makes the work harder.<br>
But your setup is fine -- as far as you have taken it.  The last thing you show in your work is<br>
V = (x - 24)(x - 24)(12)<br>
I hope you are not planning on using the problem description to set V = 4 in your equation to solve the problem....<br>