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28 February, 07:35

A copper pipe, used for plumbing from the water main to a house, is 4 meters long and has a circular cross-section 2.8 cm in diameter.

There is a 2 cm diameter hole in the center of the cross-section for the entire length of the rod. What is the volume of copper in the rod in cubic inches?

The density of copper is 559lb_m/ft^3. What is the mass of the copper pipe in pounds?

what is the volume of copper in cubic inches?

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  1. 28 February, 07:47
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    The volume of the hose is equal to the difference of the areas of the inner and outer circles with area equal to pi d^2 / 4 multiplied by height of hose, 4 meters. The annulus area is equal to 3.02 cm2. The volume is equal to 0.0012 cub, m. mass is 0.0012 cub, m times density. answer is 0.67 ft3.
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