A rectangular table, like the rectangle shown, has a border of same-sized square tiles. The rectangle has 10 tiles along the length and 6 tiles along the width for a total of 28 total tiles. Notice that 10 + 10 + 6 + 6 ≠ 28.
If the rectangular table has l tiles along the length and w tiles along the width, which of these expressions represents the total number of tiles in the border?
I.
II.
III.
IV.
A.
III only
B.
II and IV only
C.
III and IV only
D.
I only
