Question
Xuan started swimming at 10 00. Abi started swimming 20 min later but stopped swimming 13 min earlier than Xuan. Xuan stopped swimming at 11 10. How long did Abi swim? Give your answer in this format. (Eg 1 h 20 min)
2 m

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Xuan started swimming at 10 00. Abi started swimming 20 min later but stopped swimming 13 min earlier than Xuan. Xuan stopped swimming at 11 10. How long did Abi swim? Give your answer in this format. (Eg 1 h 20 min)