A man swimming downstream overcomes a float at a point \( M \). After travelling distance \( D \...

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A man swimming downstream overcomes a float at a point \( M \). After travelling distance \( D \), he turned back and passed
\( \mathrm{P} \) the float at a distance of \( D / 2 \) from the point \( M \). Then the

W ratio of speed of swimmer with respect to still water to the speed of the river will be
(1) 1
(2) 2
(3) 4
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