Calculate the width of the rectangle if its perimeter is 16m and the length is 6m.

The perimeter of a rectangle is the sum of the length and width of the rectangle multiplied by 2. Let’s write the formula for the perimeter of a rectangle:
P = (a + b) × 2,
where a is the length of the rectangle, b is the width.
Let us express the width, b, from the formula for the perimeter:
P = 2a + 2b,
2b = P-2a,
b = (P-2a): 2.
Find the width of the rectangle, b, by substituting the known values of the length and perimeter into the formula:
b = (16-2 × 6): 2 = (16-12): 2 = 4: 2 = 2 m.
Answer: The width of the rectangle is 2 m.