Carol H. answered 10/31/17
Tutor
4.9
(285)
Masters' Degree in Mathematics with 35 years Teaching Experience.
w = 10 feet
length = 3w = 30 feet
If the pen will be in the shape of a rectangular, the perimeter would be: P = 2l + 2w.
P = 2(10) + 2(30)
P = 20 + 60
P = 80 feet