Question
Salik cut 400 cm of a ribbon into 3 pieces. The 1st piece was 4 times as long as the 2nd piece. The 3rd piece was 100 cm long. How long was the 2nd piece?
4 m

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Salik cut 400 cm of a ribbon into 3 pieces. The 1st piece was 4 times as long as the 2nd piece. The 3rd piece was 100 cm long. How long was the 2nd piece?