If each side of a square is increased by 25%, find the percentage change in its area.
A) 56.25% B) 36.25%
C) 16.25% D) 12.25%
If each side of a square is increased by 25
Answer: A) 56.25%
Let each side of the square be a. Then, area = .a2
New side =125a100=5a4. New area = (5a4)2 = (25a216)
Increase in area = 25a216−a2=9a216
Increase% = [9a216*1a2*100] % = 56.25%.
Subject: Area – Quantitative Aptitude – Arithmetic Ability
Exam Prep: Bank Exams
Job Role: Bank PO