The plane of a building is in the form of square with centreline dimensions of outer walls as 14.7 m × 14.7 m. If the thickness of the wall in superstructure is 0.30 m, then its
plinth area is

A

$$ 234 m^{2} $$

B

$$ 150 m^{2} $$

C

$$ 216 m^{2} $$

D

$$ 225 m^{2} $$