Respuesta :
The volume of the insulation material is 1381.46 (inches)³, as per the volume of a cylinder.
What is the volume of a cylinder?
The volume of a cylinder is the product of the area of the base of the cylinder and the height of the cylinder.
If the base of the cylinder has a radius of 'A' and the height of the cylinder is 'H', then the volume of the cylinder will be = πA²H.
Given, the radius of the outer rim is 'R' = 77 inches.
The radius of the inner rim is 'R' = 55 inches.
The length of the pipe is 'h' = 1515 inches.
Therefore, the volume of the insulating material is
= Volume of the hollow cylinder
= (πR²h - πr²h)
= πh(R² - r²)
= 3.14 × 15.15 × (7.7² - 5.5²) (inches)³
= 3.14 × 15.15 × (59.29 - 30.25) (inches)³
= 3.14 × 15.15 × 29.04 (inches)³
= 1381.46 (inches)³
Learn more about the volume of a cylinder here: https://brainly.com/question/16227636
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