Question 191272
Let the width of the rectangle be w
Then the length of the rectangle is w + 40

Then, 2w  +  2(w + 40)  =  220
2w + 2w + 80 = 220
4w  =  140
w   =  35

Therefore, width = 35, and length = 75 (35 + 40).

Check:
220 (perimeter) =  2(35) + 2(35 + 40) 
220  =  70  +  150 (True)