Question 1134669
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{{{V = (1/3)(pi)(r^2)(h)}}}<br>
d = 3h, so r = (3/2)h<br>
{{{1000 = (1/3)(pi)((3/2)h)^2(h)}}}
{{{1000 = (1/3)(pi)(9/4)(h^3)}}}
{{{h^3 = 4000/(3(pi))}}}
{{{h = (4000/(3(pi)))^(1/3)}}}<br>
Which to 5 decimal places is 7.51501, so rounding to the nearest hundredth is not a good choice.  But since that's what it asks for....<br>
ANSWER: 7.52 feet.