A cube has all equal sides, so is a square on all faces, however, crossing it diagonally, the left and right sides will be longer, check the picture below.
The answer is 1 2/5 ft²
The area (A) of the rectangle is:
A = w * l
w - width
l - length
We have:
w = 7/8 ft
l = 1 3/5 ft = 1 + 3/5 = 5/5 + 3/5 = (5 + 3)/5 = 8/5 ft
A = w * l
A = 7/8 * 8/5
A = 7/5 = (5+2)/5 = 5/5 + 2/5 = 1 + 2/5 = 1 2/5 ft²
You can't take away 6 from 2 but you can switch them and get 6-2 and that's =4 10-8=2 7-5=2
Answer:
total - given, 360 -139 = 221