The perimeter of a square is equal to the radius of a circle having area 39424 sq cm, what is the area of square? Choose the most appropriate option.
A) 1225 sq cm
B) 441 sq cm
C) 784 sq cm
D) can ’ t say
E) none of these

Rationale: let the side of square = a cm and radius of circle = r cm given , 4 a = r also area of square = pi * r ^ 2 = 39424 , r ^ 2 = 12544 or r = 112 so a = r / 4 = 112 / 4 = 28 hence area of square = a ^ 2 = 28 ^ 2 = 784 cm ^ 2 answer : c
Answer: C