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3 men dig 6 trenches in 4 days

==> each man digs (6/3) = 2 trenches in 4 days

==> each man digs (4/2) = 1/2 trench per day.

==> Given 4 men, you get (4 x 1/2) = 2 trenches per day.

==> It takes them (24/2) = 12 days to dig 24 trenches.

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15y ago

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