Please see if I got the first question right and can I get help with the second one.
Surface area and volume of a box? Answer must be in rational denominator
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$\begingroup$
arithmetic
radicals
area
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0My answer is for volume and surface area times volume by 2(?). – 2017-02-26
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0Shouldn't "half its length" be half of $40\sqrt{10}$? Why does the number $32\sqrt5$ occur in your calculations? – 2017-02-26