What is the exact Downstream distance : Upstream distance ratio ?

Aug 2014
507
1
India
Sentence: A boy swims double the distance along the current that he swims against the current.

Does it mean Downstream distance : Upstream distance = 1 : 2 or 2 : 1?
 
Jun 2019
455
237
USA
With the current = travelling downstream.
Against the current = travelling upstream.

His distance with the current is double his distance against the current.
Distance travelled downstream = 2 ∙ Distance travelled upstream
 
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