Question 1007767
Call the length and width, L and W.  Then we have
Perimeter P = 2L + 2W = 62   and
L = W + 15
Now substitute this into the first equation and get
2(W + 15) + 2W = 62
2W + 30 + 2W = 62
4W + 30 = 62
4W = 32
W = 8 inches
Choice C.