what is the area of cubic box that contains a baseball with a diameter of 3inches please help

If the baseball "just fits" in the box and the diameter of the baseball is 3 inches,

both the width and the height of each side is 3 inches.

This makes the area of each side 3 x 3 = 9 square inches.

Since there are six sides, the total area is 6 x 9 = 54 square inches.