Advanced Engineering Mathematics
10th Edition
ISBN: 9780470458365
Author: Erwin Kreyszig
Publisher: Wiley, John & Sons, Incorporated
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Suppose that we want to send a parcel in the shape of a square-based rectangular solid, and the Standard Post service limits the sum of the length and girth (girth = the perimeter of the base) to 106 inches. Find the dimensions of the package of the greatest volume under these conditions. Write the exact answer. Do not round
___inches by______inches by_____inches
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Step 1
Given that the base is square shaped. Let x be the dimension of one side of the base.
Then, girth = perimeter of the base = 4x
Let l be the length. Sum of length and girth limits to 106 inches.
Since to find the maximum volume, take gives l=106-4x.
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