Since there are 31 potted plants with one pot in the beginning and one pot at the end of the walkway, there will be 30 intervals in between the pots. Hence, the length of the walkway is 30×4=120 metres.
After throwing away 6 pots, there will be 31-6=25 pots left. With 25 pots, there will be 24 intervals in between the pots. Therefore, the new spacing between any two pots is: 120/24=5 metres.
Final answer: the new spacing between 2 consecutive potted plants is 5 metres.
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