Answer:
10 yards
Step-by-step explanation:
The perimeter of a rectangle is 2*length+2*width, so if we know one of the sides, all we need to do is multiply the side by 2, subtract it from 30, then divide by 2 to get the other side.
5*2=10
30-10=20
20/2=10
The other side is 10 yards.