Answer:
10yds
Step-by-step explanation:
The perimeter is 2 * length + 2 * width.
If the perimeter is 90ft, which has to be converted to yards: 90/3=30yds
(Remember 3 feet in a yard)
and the width is 5yds
So:
2*length + 2* 5 = 30
2 * length = 20
length = 10
