Common Factor for 32 and 30 would be 1 and 2. Greatest common factor is 2.
If it is a rectangle then the sides of the width would be the same. Also with the sides of the length. So add the widths, 10+10=20. Subtract 20 from 90, 90-20=70. Divide 70 by 2, 70÷2=35.
The length would be 35 feet.
