Answer: The width of the library is 22feet.
Perimeter = length+ length+ width+ width
The problem is telling us that the perimeter is 116 and the length is 36. So let’s plug it in and solve for width which equal w
w= width
Step 1: 116= 36+ 36+ w+w
Step 2: 116=72+ 2w
Step 3: 116= 72+2w
-72 -72
Step 4: 44=2w
Step 5: divide 2w on both sides ( 44 divided by 2)
Step 6: w= 22