Question

Mr.James has a cylindrical beakers that measure 4 inches in diameter and are 9 inches high .What is the volume contained within the beakers? Use 3.14 for pi. Round your answer to the nearest hundredth.
56.52 cubic inches
100.34 cubic inches
113.04 cubic inches
226.08 cubic inches

Answer 1

if its diameter is 4 inches, then its radius is half that, or 2 inches.

$\bf \textit{volume of a cylinder}\\\\ V=\pi r^2 h~~ \begin{cases} r=2\\ h=9 \end{cases}\implies V=\pi (2)^2(9)\implies V=36\pi$