Q: What is the length of a rectangle if the perimeter is 100 feet and the width is 20 feet?

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You are describing a cuboid, not a rectangle. A rectangle has only two diminutions, length and width.

If the dimensions of the rectangle are in feet, the perimeter will be in feet as well. The area will be in square feet. The area is length x width. The perimeter is 2 x (length + width) or 2 x length + 2 x width.

5 feet

20

15 feet

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The perimeter of a rectangle with a length of 8.5 feet and a width of 4.5 feet is 26.

108 feet is the perimeter of a rectangle with a length of 50 feet and a width of 4 feet.

The perimeter is 30 feet for this rectangle.

The width is 8 feet

You are describing a cuboid, not a rectangle. A rectangle has only two diminutions, length and width.

If the dimensions of the rectangle are in feet, the perimeter will be in feet as well. The area will be in square feet. The area is length x width. The perimeter is 2 x (length + width) or 2 x length + 2 x width.

5 feet

gt

44

20

15 feet.

63 feet