Help with a math problem, Not sure how to set up this problem

A land is 124ft. by 115ft. What is the cost to fence the perimeter if the cost is $5 per ft?

Step 1: Find the perimeter.
The perimeter of a rectangle is just the sum of the length of the sides as you go around it.
Then, if you have a rectangle 124 x 115, the perimeter is then 124 + 115 + 124 + 115 = 478.
P = 2L + 2W = 2 (L+W) will work too.

Now we have a perimeter of 478 feet.

To find the cost of the fence, we are given that for every 1 ft, it costs $5. So how would you find the total for 478 feet. (Set up a ratio where $5/1ft = $x/478)

I hope this helps.

Well, it has two sides that are 124ft and two that are 115ft, so it's
124*2+115*2
to work out the perimeter.
Since it's $5 per ft, then you times the above by 5, so you end up with
5(124*2+115*2)
which comes to 5(248+230)=5*478=$2390