Problem: the length of one pair of opposite sides of a square is increased by 5 cm on each side the ratio of the length and the breadth of the newly formed rectangle becomes 3 : 2 . what is the area of the original square ? 
Options: ['a ) 25 sq . cm', 'b ) 81 sq . cm', 'c ) 120 sq . cm', 'd ) 225 sq . cm', 'e ) none of these']
e