+0

# volume

0
92
2

An unused roll of paper towels is shown. What is the volume of the unused roll?

Feb 24, 2021

#1
+939
+1

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.

Feb 24, 2021
#2
+483
+1

Volume = 62π(26) - (2.1)2π(26)

= 26(36π - 4.41π)

= 26(31.59π)

= 821.34π cm3

Feb 24, 2021