22. Four cylindrical cans with a radius of 2 inches are placed on their bases inside an open square pasteboard box. If the four sides of the box bulge slightly, which of the following could be the internal perimeter of the base of the box, expressed in inches?
Should be C (30).
Sides of the square that exactly fits the cylinders will be (2+2)*2 = 8 inches (twice diameter). Therefore, perimeter of such a square will be 32 inches.
Since the square box is bulging slightly, the perimeter should be slightly less or 30 inches.