Shortest walk

An ant is crawling around this cube. The cube is made of wire. Each side of the cube is 3 inches long. (Those sides are called edges.) Points A and B are vertices of the cube.
What is the least distance the ant would have to crawl if it starts from point A, crawls along every edge of the cube, and returns to point A?

Correct answer:

x =  48 in

Step-by-step explanation:

a=3 in  n=12+4=16  x=n a=16 3=48 in

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