Twelve trees are equally spaced along ne side of a straight road. The distance from the first tree to the sixth is 100 feet. What is the distance in feet between the first and last trees?

Answer 1

6-1 = 5 trees difference = 100

12-1 = 11 trees difference

1 tree difference = 100/5 = 20

11 trees difference = 11 x 20 = 220 feet from 1st to last tree.