CAT 2020 Quant Question [Slot 3] with Solution 20

Dropping a perpendicular DE onto AB, the figure is divided into two parts - a rectangle of dimensions \(4 \times 5\) and an isosceles triangle AED.

Required answer = Area of rectangle + Area of triangle \( = 4 \times 5 + \frac{1}{2}(4 \times 4) = 28c{m^2}\)