An unused roll of paper towels is shown. What is the volume of the unused roll?
+1223 Volume of roll = (volume of big cylinder) - (volume of little cylinder)
The volume of a cylinder with radius r and height h is \(\pi r^2 h.\)
\(V = \pi (\frac{12}{2})^2(26) - \pi (\frac{4.2}{2})^2(26) = \boxed{821.34}\) cm^3.
+592 Volume = 62π(26) - (2.1)2π(26)
= 26(36π - 4.41π)
= 26(31.59π)
= 821.34π cm3
