Take the small side as x, the longer side is twice as long, i.e. 2x. Perimeter = 2 small sides plus 2 long sides. Perimeter = 2x + 2(2x)=30 Perimeter = 6x=30 x=5cm. So small side is 5cm and long side is 10cm. Area is one side multiplied by another. Area = 5 * 10 = 50 square cm.
