Question
20 children are sitting in a row at an equal distance from one another. The distance between the 10th and the 20th children is 40 m. How far apart is the 1st child and the last child?
4 m

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20 children are sitting in a row at an equal distance from one another. The distance between the 10th and the 20th children is 40 m. How far apart is the 1st child and the last child?