Mr Snyder is tiling a floor. The floor is 16 tiles long and 9 tiles wide. The center section is 12x long and 5 tiles wide. How many tiles are in the border section?

Answer 1

well, on the end, you have 4 wide (16-12)*5, and the width 9-5 by 12

tiles in border=20+48

draw the figure, and check my thinking.