Question
The total length of a wire, a ribbon and a thread is 49.2 m. The thread is 9 m longer than the wire. The ribbon is 4 times as long as the wire. Find the difference in length between the ribbon and the thread.
4 m

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The total length of a wire, a ribbon and a thread is 49.2 m. The thread is 9 m longer than the wire. The ribbon is 4 times as long as the wire. Find the difference in length between the ribbon and the thread.