Answer: 6 feet x 3 feet
Step-by-step explanation:
Let the height be given by= x
The length is= 6x -2 (1) from both sides= 6x-2
The width is= 3x-2(1) from both sides= 3x-2
The total volume= length * width * height
4=(6x-2)*(3x-2)*x
Solving we get,
x=1 and other factor is not the valid option.
So the outer dimensions should be 6 feet x 3 feet