# A famous swimmer can swim downstream in a lake in exactly 40 minutes with the lake current. He can swim upstream........

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A famous swimmer can swim downstream in a lake in exactly 40 minutes with the lake current.
He can swim upstream in that lake in exactly 60 minutes against the lake current.
The length of the lake is 2 km.

How long he can cover the distance of one side at a still lake with no current?

posted Nov 8
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