Question

2) The York's are getting a new puppy. They are building a square shaped playpen in their backyard. The pen will cover 121 square feet. How many feet of fencing would they need to completely enclose the perimeter of the pen for the puppy?

Answer 1

In order to determine the number of feet of fencing, consider that the area and the perimeter of a square is:

A = l²

P = 4l

From the formula for the area solve for l:

A = 121 ft² = l²

l =√121 ft² = 11 ft

Next, replace this value into the formula for P:

P = 4l = 4(11 ft) = 44 ft

Hence, there are necessary 44 ft of fencing