What part of a ditch, 48 metres long, 16.5 metres board and 4 metres deep can be

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What part of a ditch, 48 metres long, 16.5 metres board and 4 metres deep can be filled by the earth got by digging a cylindrical tunnel of diameter 4 metres and length 56 metres ?

Options:

A . $$\frac{1}{9}$$

B . $$\frac{2}{9}$$

C . $$\frac{7}{9}$$

D . $$\frac{8}{9}$$

Answer: Option B

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