In the given figure, find the area of the unshaded portion within the rectangle. (Take π = 3.14)

Let ABCD be a rectangle. From figure, AB = CD = 6 cm and, AD = BC = 15 cm. Area of rectangle = l × b = AD × AB = 15 × 6 = 90 cm 2 . Area of shaded portion = π(3) 2 + π(3) 2 + Area of unshaded region = Area of rectangle - Area of shaded region = 90 - 70.65 = 19.35 cm 2 . Hence, area of unshaded region = 19.35 cm 2 .