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What part of a ditch, 48 metres long,...

What part of a ditch, 48 metres long, 16.5 metres broad and 4 metres deep can be filled by the earth got by digging a cylindrical tunnel of diameter 4 metres and length 56 metres? `1/9` (b) `2/9` (c) `7/9` (d) `8/9`

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