Question 67445
A. Find the area of the original piece of cardboard: A = 8X12 = 96 sq.in.
Subtract the area of the 4 removed corners: 4(2X2) = 16 sq.in.

A. New area = (8X12) - 4(2X2) = 96 - 16 = 80 sq.in.

The volume of the newly-formed box is found by multiplying the old length less two of the corners: (12-2(2) = 12-4 = 8 in.) by the old width less two of the corners: (8-2(2) = 8-4 = 4) by the height of the box (2 in.)
B. V = (12-4)(8-4)(2) = 8X4X2 = 64 cu.in.