The length of the rectangle is 3 times its width. what is the perimeter of a rectangle if the width is 2dm.

We begin to solve the problem with the condition: the length of the rectangle is 3 times its width, which is equal to the perimeter of the rectangle if the width is 2 dm.
To find the perimeter of a rectangle, you need to use the formula P = 2a + 2b.
First, we find the length of the rectangle, for this we multiply the width by 3, since by condition the length is 3 times the width:
2 * 3 = 6 dm
Substitute the known values into the formulas and get: P = 2 * 2 + 2 * 6.
Let’s multiply and add and get:
P = 4 + 12 = 16 dm.
Answer: P = 16 dm.