Question
The total length of a string, a wire and a ribbon is 37.9 m. The ribbon is 12 m longer than the string. The wire is 5 times as long as the string. Find the difference in length between the wire and the ribbon.
4 m

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The total length of a string, a wire and a ribbon is 37.9 m. The ribbon is 12 m longer than the string. The wire is 5 times as long as the string. Find the difference in length between the wire and the ribbon.