11 lamp posts are placed along a road at equal distances. The distance between the sixth and the ninth 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 sixth and the ninth lamp post
= 9 - 6
= 3
Distance between 2 lamp posts
= 27 ÷ 3
= 9 m
(b)
Number of intervals between first and the last lamp post
= 11 - 1
= 10
Distance between the first and the last lamp post
= 10 x 9
= 90 m
Answer(s): (a) 3 m; (b) 90 m