Acampground consists of 9 square campsites arranged in a line along a beach. the distance from the edge of a campsite to the water at the end of the beach is 5 yd. the area of the campground, including the beach, is 1115 sq yd. what is the width of one campsite?

We know that each campsite is a square; we also know that all the sides of a square are equal; therefore the length and the width of each campsites are equal. Lets label  to each side of our campsite. From the problem we know that the distance from the edge of a campsite to the water at the end of the beach is 5 yd, so the distance including our campsite will be . Also, since each campsite have length=x, the total length of the 9 campsites will be . Now we have a big rectangle including the campground and the beach of length= and width=.  The area of a rectangle is , and from our problem we know that area is 1115 square yards, so we can set up an equation and solve for  to find the width of each campsite:



Using the quadratic formula to solve the equation, we get that:
or 
Since distances cannot be negative, the solution is 

We can conclude that the width of each campsite is 8.9 yards.

Then why is the question on here if you know the answer