169k views
0 votes
Tom is going to build a fence around his garden which is a rectangle measuring 8 m by 20 m. He will first put in posts which will be 4 m apart. If the posts cost $5.50 each, what will be the total cost for all the posts?

2 Answers

1 vote
$77. If one side is 20 then there are 5 posts that are 4m apart. And for 8 there are 2 posts that are 4m apart. The total amount of. Posts is 14. You then multiply 14 and 5.50 and get $77.
User Lobster Fighter
by
7.7k points
2 votes
The first thing you should do for this case is to find the perimeter of the rectangle.
We have then:
P = 2L + 2W
Where,
L: long
W: wide.
Substituting the values:
P = 2 * (20) + 2 * (8)
P = 56 m
Then, to find the number of posts we have:
N = P / d
where,
P: perimeter
d: distance between posts.
Substituting:
N = (56) / (4) = 14
The total cost will be:
(5.50) * (14) = $ 77
Answer:
the total cost for all the posts wil be 77 $
User Nikita Took
by
8.1k points

No related questions found

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.4m questions

12.2m answers

Categories