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What is the perimeter of a rectangle if its shortest side is 5 cm less than its longest side and has an area of 18.75 square cm?
Wiki User
∙ 7y ago
Let its sides be x and x -5:-
So: x*(x-5) = 18.75
Or: x^2 -5x -18.75 = 0
Solving the above quadratic equation gives x a positive value of 7.5
Therefore: length = 7.5 cm and width = 7.5 -5 => 2.5 cm
Perimeter of rectangle: 2*(7.5+2.5) = 20 cm
Wiki User
∙ 7y ago
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