A blackboard has an area of 28 ft squared and a perimeter of 22 feet What are the dimensions of the board?

For a rectangle, the area is length × width and the perimeter is 2(length + width). The dimensions 4 feet by 7 feet give an area of 4 × 7 = 28 square feet and a perimeter of 2(4 + 7) = 22 feet. Therefore, the board is 4 feet by 7 feet.

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