A wooden box has a square base. The height of this box is 3 times the length of one side of the base. If one side of the base is 3 feet long, what is the volume of this box?
- A9 cu ft
- B27 cu ft
- C36 cu ft
- D81 cu ft
Show the answer
Correct answer: D
One side of the square base is 3 ft long. Since the height of the box is 3 times the length, then the height is
3 × 3 = 9 ft.
The volume of a rectangular prism is length × height width. The volume of the wooden box is
V= 3 × 3 × 9 = 81 cu ft.