Volume of cube = 6*6*6 cubic inches. If the box is h inches high, volume of the box = 8*9*h cubic inches. So 6*6*6 = 8*9*h so h = 6*6*6/(8*9) = 3 inches.
14.985
9 feet 3/8 inches - 8 feet 2 5/8 inches = 9.75 inches.
12 inches
Assuming it's a cuboid, 270 cubic inches
The value of z is 8 inches because 4*8*9 = 288 cubic inches
16 feet 5 inches.
15 feet 5 inches
(18 feet 8 inches) - (9 feet 3 inches) equals 9.41666667 feet (9 feet 5 inches).
11 inches
5' 8 (9/10)"
270 cubic inches