AMC8 2001
AMC8 2001 · Q6
AMC8 2001 · Q6. It mainly tests Arithmetic sequences basics, Area & perimeter.
Six trees are equally spaced along one side of a straight road. The distance from the first tree to the fourth is 60 feet. What is the distance in feet between the first and last trees?
六棵树等间距地沿着一条直路的单侧排列。从第一棵树到第四棵树的距离是60英尺。第一棵树和最后一棵树之间的距离是多少英尺？
(A)
90
90
(B)
100
100
(C)
105
105
(D)
120
120
(E)
140
140
Answer
Correct choice: (B)
正确答案：（B）
Solution
There are three spaces between the first tree and the fourth tree, so the distance between adjacent trees is 20 feet. There are 6 trees with five of these 20-foot spaces, so the distance between the first and last trees is 100 feet.
第一棵树和第四棵树之间有三个间距，所以相邻树之间的距离是20英尺。有6棵树，有五个这样的20英尺间距，所以第一棵树和最后一棵树之间的距离是100英尺。
Topics
Related Questions
Practice full AMC exams on amcdrill.
Try full-length practice and diagnostics at www.amcdrill.com.