Question

the radius of a cylindrical construction pipe is 3.5 ft. if the pipe is 30 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 cylinder volume formula

The volume $V$ of a cylinder is $V = \pi r^2 h$, where $r$ is radius, $h$ is length/height.

Step2: Substitute given values

$r = 3.5$ ft, $h = 30$ ft, $\pi = 3.14$
$V = 3.14 \times (3.5)^2 \times 30$

Step3: Calculate $r^2$ first

$(3.5)^2 = 12.25$

Step4: Multiply values sequentially

$3.14 \times 12.25 = 38.465$
$38.465 \times 30 = 1153.95$

Step5: Round to nearest whole number

$1153.95 \approx 1154$

Answer:

1154 cubic feet