Marjorie is building a dog run that is 25'8" long and 8'8" wide. How much fencing will she need if the opening is 3'6" wide and will not need fencing?

782 in

Step-by-step explanation:

To find the length of fence, we have to find the perimeter first.

Given

Length = l = 25 feet 8 in

Width = w = 8 feet 8 in

Opening = o = 3 feet 6 in

So,

we have to convert the lengths into same unit first

So,

l = (25*12) + 8 = 308 in

w = (8*12) + 8 = 104 in

O = (12*3) + 6 = 42 in

Perimeter = 2 (l+w)

= 2 (308+104)

=2 (412)

=824

As the opening does not need fencing

Total fence = P - o

= 824 - 42

=782 in

or

65 feet 2 in ...