Question
Some dustbins are placed along a street at equal distances. The distance between the 1st and the 4th dustbin is 30 m. The distance between the 1st and the last dustbin is 70 m. How many dustbins are there altogether?
4 m

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Some dustbins are placed along a street at equal distances. The distance between the 1st and the 4th dustbin is 30 m. The distance between the 1st and the last dustbin is 70 m. How many dustbins are there altogether?