Question
Bobby cycled from the bank to the playground at 129 m/min. His sister cycled from the playground to the bank at 118 m/min. Both of them started cycling towards each other at the same time and did not change their speeds throughout their journey. When Bobby reached the bank, his sister was 407 m from the playground. What was the distance between the bank and the playground? Express your answer in m.
4 m

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Bobby cycled from the bank to the playground at 129 m/min. His sister cycled from the playground to the bank at 118 m/min. Both of them started cycling towards each other at the same time and did not change their speeds throughout their journey. When Bobby reached the bank, his sister was 407 m from the playground. What was the distance between the bank and the playground? Express your answer in m.