Final answer:
The perimeter of a rectangle with length 3x and area 12x is 14x. If x is 2 inches, then the perimeter is 28 inches.
Step-by-step explanation:
The subject of this question is Mathematics. We are given a rectangle with length 3x and area 12x. The area of a rectangle is calculated as length * width. So, 12x = 3x * width. Solving this equation for width, we get width = 4.
Now, to find the perimeter of the rectangle, we use the formula perimeter = 2 * (length + width). Substituting the values we have, perimeter = 2 * (3x + 4). This simplifies to perimeter = 2*7x = 14x.
If x is 2 inches, then perimeter = 14 * 2 = 28 inches.
Learn more about Rectangle Perimeter