Question

extra credit (3 points)

1. a pipe with a wall thickness of 0.20 inch has an outside diameter of 3.50 inches. determine the inside circumference of the pipe.

Explanation:

Step1: Calculate the inside diameter

The outside diameter \(d_{out}=3.50\) inches. The wall thickness \(t = 0.20\) inch. The inside diameter \(d_{in}=d_{out}-2t\).
\(d_{in}=3.50 - 2\times0.20=3.50 - 0.40 = 3.10\) inches.

Step2: Calculate the inside circumference

The formula for the circumference of a circle is \(C=\pi d\). Using \(d = d_{in}=3.10\) inches and taking \(\pi\approx3.14\).
\(C=\pi\times d_{in}\approx3.14\times3.10 = 9.734\) inches.

Answer:

The inside circumference of the pipe is approximately \(9.73\) inches.