if length of rectangle is increased by 10%, and breadth is decreased by 10%.what will it effect on area of rectangle?	Choose one: A) it will have no effect B) 1 % increase C) 1 % decrease D) 2 % increase E) 2 % decrease

Rationale: let initial length = l , and breadth = b area = l * b new length = l * 110 % = [ l * 110 / 100 ] = 11 l / 10 , new breadth = 9 b / 10 new area = 11 l / 10 * 9 b / 10 = 99 / 100 lb decrease in area = [ lb - 99 / 100 lb ] = lb / 100 = % decrease = [ lb / 100 * 1 / lb * 100 ] = 1 % answer c
Answer: C