Question

The perimeter of the surface of a workbook is 40 inches. The workbook is 11 inches tall. How wide is it?

Answer 1

9 inches

Explanation:

11 times two for the two equal sides is 22. 40-22 equals 18. 18 is the sum of the other two sides so you divide by two. 18/2 equals 9, so 9 inches.