Discussion

Explanation:

Since 5-12-13 forms a Pythagorean triplet, the triangle under consideration is a right-angled triangle with height 12 and base 5.
So area of the triangle = 12(12)(5) = 30 sq. units.

If area of the rectangle with width 10 units is 30 sq. units, its length = 3 units.
Hence, its perimeter = 2(10 + 3) = 26 units.

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