Question
Stools are placed at an equal distance from one another along the hallway. The distance between the 20th and the 40th stool is 8 m. What is the distance between the 1st and the 40th stool?
4 m

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Stools are placed at an equal distance from one another along the hallway. The distance between the 20th and the 40th stool is 8 m. What is the distance between the 1st and the 40th stool?