If a rectangle has width 4 ft and area 36 square feet, what is the length in feet?

If a rectangle has width 4 ft and area 36 square feet, what is the length in feet?

• A. 7 ft
• B. 9 ft
• C. 8 ft
• D. 10 ft

Answer: (B)

The area of a rectangle comes from multiplying its length by its width. Here, the area is 36 square feet and the width is 4 feet. So the length must be found by dividing the area by the width: length = 36 ÷ 4 = 9 feet. Check by multiplying back: 9 × 4 = 36, which matches the given area. Therefore, the length is 9 feet.

The area of a rectangle comes from multiplying its length by its width. Here, the area is 36 square feet and the width is 4 feet. So the length must be found by dividing the area by the width: length = 36 ÷ 4 = 9 feet. Check by multiplying back: 9 × 4 = 36, which matches the given area. Therefore, the length is 9 feet.