Answer:
Step-by-step explanation:
I foot = 12 inches
1 inch = 1/12 foot
If the books are 1.-inch wide, converting to foot, it becomes 1/12 foot wide. It means that the total space occupied by 10 books of this size is
10 × 1/12 = 10/12 = 0.833 foot.
If the books are 1.25-inch wide, converting to foot, it becomes 1/12 × 1.25 = foot wide. It means that the total space occupied by 10 books of this size is
10 × 1/12 × 1.25 = 12.5/12 = 1.042 foot.
Total space occupied by the books would be
0.833 + 1.042 = 1.875 feet
Amount of room left in the bookshelf would be
4 - 1.875 = 2.125 feet
