Why is the answer d for question #33?

Its asking for the diagonal (hypotenuse), and you're given the sides.


the exact answer is 325 something,

so D is correct

The diagonal of the square base = one side of the base × square root (2)
This is because the angle between 2 sides of a square is 90, and since the diagonal is the hypotenuse of a triangle formed by 1/2 of the square. So by the Pythagorean Theorem:

therefore 230√2 = 230×1.41 = 325
So D) 320 is the closest to 325