14 lamp posts are placed along a road at equal distances. The distance between the third and the ninth lamp post is 54 m.
- What is the distance between 2 lamp posts?
- What is the distance between the first and the last lamp post?
(a)
Number of intervals between the third and the ninth lamp post
= 9 - 3
= 6
Distance between 2 lamp posts
= 54 ÷ 6
= 9 m
(b)
Number of intervals between first and the last lamp post
= 14 - 1
= 13
Distance between the first and the last lamp post
= 13 x 9
= 117 m
Answer(s): (a) 6 m; (b) 117 m