The length of the rectangular vegetable garden is 12 m, and the width is 1/3 of the length.

The length of the rectangular vegetable garden is 12 m, and the width is 1/3 of the length. How long is the fence needed around the garden?

In order to find the length of the fence, you need to find the perimeter of the rectangle. Length -12 m. Width 1/3 of the length.
This means the width is 12: 3 = 4 m.
The rectangle has four sides – 2 lengths and 2 widths.
So in order to calculate the perimeter of the rectangle 12 * 2 + 4 * 2 = 32.
Answer: Around the garden you need a long fence. 32 meters.