The perimeter of a rhombus is 40 cm and the measure of an angle is 60°, then the area of it is-

A

100 $$\sqrt{3} cm^{2}$$

B

75 $$\sqrt{3} cm^{2}$$

C

180 $$\sqrt{3} cm^{2}$$

D

50 $$\sqrt{3} cm^{2}$$