Estimate how many textbooks of 1000 pages stacked on top of each other would make a stack of books 10 feet high.
A) 60
B) 50
C) 40
D) 30
E) 20

Question

Quizplus · Accepted Answer

10 feet = 120 inches. Each textbook is 1000 pages, and each page is about 0.004 inches thick. So, the height of one textbook is 1000 * 0.004 = 4 inches. The number of textbooks needed to make a stack 120 inches high is 120 / 4 = 30.

Estimate How Many Textbooks of 1000 Pages Stacked on Top