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# cylinder

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What is the radius, in inches, of a right circular cylinder if its lateral surface area is 3.5 square inches and its volume is 10.5 cubic inches?

Jul 16, 2022

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The lateral surface area tells us that $$2 \pi r \times h = {7 \over 2}$$

We also know that, from the volume, $$\pi r^2 \times h = {21 \over 2}$$

Now, just solve for r and h

Jul 16, 2022