The portion of a ditch 48 m long, 16.5 m wide and 4 m deep that can be filled with stones and earth available during excavation of a tunnel, cylindrical in shape, of a diameter 4 m and length S6 mis

A

$$\frac{1}{9}$$ part

B

$$\frac{2}{9}$$ part

C

$$\frac{1}{2}$$ part

D

$$\frac{1}{4}$$ part