Question
The total length of 7 strings and 6 ribbons is 351 cm. The length of a ribbon is 13 of the length of the string. What is the total length of the 6 ribbons?
4 m

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The total length of 7 strings and 6 ribbons is 351 cm. The length of a ribbon is 13 of the length of the string. What is the total length of the 6 ribbons?