In the diagram, the rectangular wire grid contains 15 identical squares. The length of the rectangular grid is 10 . What is the length of wire needed to construct the grid?
(A) 60
(B) 70
(C) 120
(D) 66
(E) 76

![](https://cdn.mathpix.com/cropped/2024_04_20_6ed09463f225f8ba1f07g-092.jpg?height=244&width=328&top_left_y=2247&top_left_x=1294)
Since the length of the rectangular grid is 10 and the grid is 5 squares wide, then the side length of each square in the grid is $10 \div 5=2$.

There are 4 horizontal wires, each of length 10 , which thus have a total length of $4 \times 10=40$. Since the side length of each square is 2 and the rectangular grid is 3 squares high, then the length of each vertical wire is $3 \times 2=6$.

Since there are 6 vertical wires, the total length of the vertical wires is $6 \times 6=36$.

Therefore, the total length of wire is $40+36=76$.

ANSWER: (E)

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