Chapter 13.3, Problem 16P

Fifty pounds of wrapping paper are wound onto a roll. Looking at the roll from the side, we see that the outer diameter of the roll is 3 times the inner diameter, as indicated in Figure 13.38 . The inner (unshaded) part of the roll is not fllled wuth paper. How much would the same kind of wrapping paper weigh if the outer diameter of the roll were 2 times the inner diameter? Explain your reasoning.

 

 Figure 13.38 Wrapplng paper wound onto a roll