What is the perimeter of 4 ft by 10 ft?

The perimeter of a rectangle is calculated by adding the lengths of all its sides. In this case, the rectangle has two sides that are 4 feet long and two sides that are 10 feet long. To find the perimeter, you add 4 + 4 + 10 + 10, which equals 28 feet. Therefore, the perimeter of a 4 ft by 10 ft rectangle is 28 feet.