Zaineb I. answered 01/31/16
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By using ratio method, In one minute John swam 1/(4x6)= 1/24 miles.
In the same way sherry swam 5/(8x3)=5/24 miles in a minute.
So from above information it is clear that Sherry swam farther in one minute.
Hope it helped. :)
Jack S.
01/31/16