If the perimeter of a rectangle is 48 and its length is 12, what is its width?

A. 4
B. 8
C. 12
D. 16

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To find the width of the rectangle, we can use the formula for the perimeter of a rectangle: P = 2(L + W), where P is the perimeter, L is the length, and W is the width.

Given that the perimeter is 48 and the length is 12, we can substitute these values into the formula:

48 = 2(12 + W)
Expanding the expression on the right side:

48 = 2(12) + 2(W)
48 = 24 + 2W
Dividing both sides by 2:

24 = 2W
Dividing both sides by 2:

12 = W

So the width of the rectangle is 12.