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In order to answer this question you must first convert the measurements into inches(20 ft= 240 in), so the new problem is 240*240*3, which equals 172800. Then you must convert the inches into yards by dividing 172800 by 36, which equals 4800.

So it takes 4800 yards of sand to fill a sandbox 20 feet by 20 feet by 3 inches.

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10y ago
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Q: How many yards of sand to fill a sand box 20 ft wide by 20 ft wide by 3 inches deep?
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