Quantitative Aptitude – Geometry - Rectangle – From a rectangle ABCD of area 768 sq cm Slot -2 – Quantitative Aptitude – Geometry - Rectangle – From a rectangle ABCD of area 768 sq cm From a rectangle ABCD of area 768 sq cm, a semicircular part with diameter AB and area 72π sq cm is removed. The perimeter of the leftover portion, in cm, is? a) 88 + 12π b) 82 + 24π c) 80 + 16π d) 86 + 8π Answer: a) 88 + 12π Solution: Given area of semicircle = 72π Or (πr^2)/2 = 72π r = 12 So AB = 24