A hollow spherical metallic ball has an external diameter 6 cm and is 1/2 cm thick. The volume of metal used in the metal is

Question

( A ) 47\large\frac{1}{5}
( B ) 46\large\frac{2}{5}
( C ) 45\large\frac{3}{5}
( D ) 47\large\frac{3}{5}