12 lamp posts are placed along a road at equal distances. The distance between the fifth and the eighth lamp post is 27 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 fifth and the eighth lamp post
= 8 - 5
= 3
Distance between 2 lamp posts
= 27 ÷ 3
= 9 m
(b)
Number of intervals between first and the last lamp post
= 12 - 1
= 11
Distance between the first and the last lamp post
= 11 x 9
= 99 m
Answer(s): (a) 3 m; (b) 99 m