Question

the radius of a cylindrical construction pipe is 1.5 ft. if the pipe is 15 ft long, what is its volume? use the value 3.14 for π, and round your answer to the nearest whole number. be sure to include the correct unit in your answer.

Explanation:

Step1: Recall volume formula for cylinder

$V = \pi r^{2}h$

Step2: Substitute given values

$r = 1.5$ ft, $h=15$ ft, $\pi = 3.14$. So $V=3.14\times(1.5)^{2}\times15$.
First calculate $(1.5)^{2}=2.25$. Then $V = 3.14\times2.25\times15$.
$3.14\times2.25 = 7.065$, and $7.065\times15=105.975$.

Step3: Round to nearest whole number

Rounding $105.975$ to nearest whole number gives $106$.

Answer:

$106$ ft$^{3}$