What is the perimeter of a rectangle with length 11 units and width 9 units?

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Multiple Choice

What is the perimeter of a rectangle with length 11 units and width 9 units?

Explanation:
Perimeter is the distance around the shape, so for a rectangle you add all four sides. This is the same as doubling the sum of its length and width: P = 2 × (length + width). With a length of 11 and a width of 9, length + width = 20, and doubling gives 40. So the perimeter is 40 units. The other numbers reflect common arithmetic slips, but following the correct method yields 40.

Perimeter is the distance around the shape, so for a rectangle you add all four sides. This is the same as doubling the sum of its length and width: P = 2 × (length + width). With a length of 11 and a width of 9, length + width = 20, and doubling gives 40. So the perimeter is 40 units. The other numbers reflect common arithmetic slips, but following the correct method yields 40.

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