the perimeter of a square is equal to the radius of a circle having area 39424 sq cm , what is the area of square ?
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
square_area(square_edge_by_perimeter(sqrt(divide(39424, const_pi))))