The length and width of the rectangle in discuss are; 20 and 12 respectively.
It follows from the ratio given in the task content that the total partitioning of the length and width is; 5+3 = 8.
However, since the perimeter of the rectangle is;
64 = 2(5x+ 3x)
x = 4.
On this note, the length of the rectangle is; 5×4 = 20. and the width is; 3×4 = 12.
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