Question

Tony wants to build a fence around his rectangular garden that has

dimensions 20 ft by 35 ft. His fence posts need to be placed 5 ft apart.
How many posts will Tony need to buy?
posts

Answer 1

22

Explanation:

The side of the rectangle that is 20 feet divide it by 5

`(20)/(5)=4`

Now we add one to this as the fence post each required in each 5 feet section.

The same is the case for the opposite side.

So, the number of fence posts for the 20 feet sides is
`5+5=10`

Now for the 35 feet side

`(35)/(5)=7`

Remove 1 fence post from the ends as that fence post will be covered by the ones on the 20 feet side.

So, new posts on the 35 ft side is 6.

So, the number of fence posts for the 20 feet sides is
`6+6=12`

Total number of posts is
`10+12=22`