Volume of Concrete A culvert is constructed out of large cylindrical shells cast in concrete, as shown in the figure. Using the formula for the volume of a cylinder given on the inside front cover of this book, explain why the volume of the cylindrical shell is $$V=\pi R^{2} h-\pi r^{2} h$$ Factor to show that $V=2 \pi \cdot$ average radius $\cdot$ height $\cdot$ thickness Use the unrolled diagram to explain why this makes sense geometrically.
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Step 1: Start with the formula for the volume of a cylindrical shell: \(V = \pi R^{2} h - \pi r^{2} h\). Show more…
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Volume of Concrete A culvert is constructed out of large cylindrical shells cast in concrete, as shown in the figure. Using the formula for the volume of a cylinder given on the inside front cover of this book, explain why the volume of the cylindrical shell is $$V=\pi R^{2} h-\pi r^{2} h$$ Factor to show that $$V=2 \pi \text { . average radius } \cdot \text { height } \cdot \text { thickness }$$ Use the "unrolled" diagram to explain why this makes sensegeometrically.
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Algebraic Expressions
A culvert is constructed out of large cylindrical shells cast in concrete, as shown in the figure. Using the formula for the volume of a cylinder, explain why the volume of the cylindrical shell is $$V=\pi R^{2} h-\pi r^{2} h$$ Factor to show that $V=2 \pi \cdot$ average radius $\cdot$ height $\cdot$ thickness Use the "unrolled" diagram to explain why this makes sense geometrically.
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Factoring
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Elementary and Intermediate Algebra
Algebra and Trigonometry
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