Where does the 1/(12*2) come from? **Problem Statement:**Calculate the volume (in cubic feet) of material used in making 350 feet of 2-inch Type L copper tubing.[Input Box] ft³---**Instructions:**1. To find the volume of material, you need to consider the dimensions of the tubing and its length.2. Type L copper tubing has a certain thickness you may need to calculate the volume.3. Use the formula for the volume of a cylinder to find the total volume: \[ \text{Volume} = \pi \times \left( \text{Outer radius}^2 - \text{Inner radius}^2 \right) \times \text{Length} \]4. Convert the diameter measurements from inches to feet before calculation.5. Calculate the inner and outer radius given the thickness or consult standard sizing for Type L copper tubing if needed. **Step 1**Given that,From the table of type L copper tube For a 2 in. nominal size tube: Outside diameter, \( D_{\text{out}} = 2.125 \, \text{in} \) Inside diameter, \( D_{\text{in}} = 1.985 \, \text{in} \) Length of the copper tubing: \( L = 350 \, \text{ft} \) **Step 2**Hence the volume of type L copper tube of 2 inches in size can be calculated as,\[ V = \frac{\pi}{4} \left( D^2_{\text{out}} - D^2_{\text{in}} \right) L \]\[ V = \frac{\pi}{4} \left( 2.125^2 - 1.985^2 \right) \times 350 \times \frac{1}{12 \times 2} \]\[ V = 1.098 \, \text{ft}^3 \]

Given data Length of copper tubing (L) = 350 ft For a 2 in. nominal tube size (from the table of type L copper tube) Internal Diameter (d) = 1.985 in. = 1.98512ft Outer diameter (D) = 2.125 in = 2.12512ft The volume of type L copper tube can be calculated as below V = π4(D2-d2)*L = π4*2.12512 ft2-1.98512 ft2*(350 ft) it can be written as = π4*(2.1252-1.9852)*350*1122 = 1.098 ft3 so the term112*2 is wrong it should be 1122 for the conversion of in.2 into ft2