Question

Anna wants to put a fence around a rectangular garden plot that measures 9 feet by

18 feet. She wants to place posts at the corners of the plot and every 2 feet around
the perimeter of the plot. How many posts does she need?​

Answer 1

Hello!

The answer is:

Anna will need 27 posts.

Why?

To calculate how many post does she need to place at the corners and every 2 feet around, we need to calculate the perimeter of the garden plot.

So, we can calculate the perimeter of the garden plot (rectangle) using the following formula:

`Perimeter=2height+2width`

We know that:

`height=9ft\\width=18ft`

Then, calculating the perimeter of the garden plot, we have:

`Perimeter=2height+2width`

`Perimeter=2*9ft+2*18ft=18ft+36ft=54ft`

Now, calculating how many post she will need, we have:

`No.Post=(Perimeter)/(DistanceBetweenPost)\\\\(54feet)/(2feet)=27posts`

Hence, we have that Anna will need 27 posts.