Question: Using the section of the arched dam shown, provide / determine the distance of centroid from the y - axis and centroid from the x

Using the section of the arched dam shown, provide/determine the distance of centroid from the y-axis and centroid from the x-axis. Using Pappus Theorem II, Calculate the mass m of concrete required to construct the arched dam shown if its cross-section is revolved 60 about the y-axis.Concrete has an average density of 2400 kg/m3
Using the section of the arched dam shown,

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