Answer:

Step-by-step explanation:
we know that
The volume of a pyramid is given by the formula

where
B is the area of the base
h is the height of the pyramid
we have

substitute the given values

59.346
V = pi * r^2 * h
V = 3.14 * 3^2 * 2.1
V = 3.14 * 9 *2.1
V = 3.14 * 18.9
V = 59.346
Answer:
15 inches. much longer than that guy's rod from library 1 :))