If each edge of a cube is increased by 50%, find the percentage increase in Its surface area  Select the correct option.
A) 125 %  B) 129 %  C) 185 %  D) 725 %  E) 145 %

Rationale: let the edge = a cm so increase by 50 % = = total surface area of original cube = tsa of new cube = = = increase in area = = increase % = = 125 % answer : a
Answer: A