Question

Vijay is building a new rectangular enclosure in his backyard for his chickens. He has 40 feet of fencing material and he wants the width of the enclosure to be 8 feet. If l is the length of the enclosure, and Vijay used all of the fencing material, which equation best models the situation?
A. l + 8 = 40

B. 2l + 8 = 40

C. 2(l + 8) = 40

D. 2l + 2(l + 8) = 40

Answer 1

The answer is C

The reason: There are two width and two length sides. So, therefore, if you want the fencing to equal 40 feet around the perimeter, 8 · 2 + L · 2 has to = 40.
You would factor 2 out, and you get 2(8 + L) = 40.