Question
A plank 7 m long is cut into 3 pieces. The 3rd piece is 12 m long. The 1st piece is 56 m longer than the 3rd piece. What is the length of the 2nd piece?
3 m

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A plank 7 m long is cut into 3 pieces. The 3rd piece is 12 m long. The 1st piece is 56 m longer than the 3rd piece. What is the length of the 2nd piece?