If a hexagon has a shape inside it that contains 7 small hexagons with the area of 180cm^2 all together, then what is the area of the center hexagon(inside

If a hexagon has a shape inside it that contains 7 small hexagons with the area of 180cm^2 all together, then what is the area of the center hexagon(inside the shape)

 

A)15     B)18    C)20     D)30   E)36