Question
PSLE
Tom has a string which is 31 cm long. He cuts it into three pieces. The first piece is (2f - 1) cm, the second one is f cm and the third one is 5f cm.  Find the value of f. Give your answer in cm.
2 m

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PSLE
Tom has a string which is 31 cm long. He cuts it into three pieces. The first piece is (2f - 1) cm, the second one is f cm and the third one is 5f cm.  Find the value of f. Give your answer in cm.