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CAT 2023 Slot 2 QA Question & Solution

AlgebraHard

Question

The area of the quadrilateral bounded by the Y-axis, the line x = 5, and the lines $\mid x-y\mid-\mid x-5\mid=2$, is

Solution

From the inequality and nature of x, and y, we get the given diagram:

Question Figure

We need to find the area of the quadrilateral ABDE = area of rectangle ABCD + area of triangle CDE

=> Area of ABCD = (7-3)*5 = 20 units, and the area of triangle CDE = (1/2)*10*5 = 25 units.

Hence, the area of the quadrilateral ABDE = (20+25) = 45 units.