A metal circular ring has a circular cross section of radius r. If R is the radius of the ring (measured to the middle of the cross section), the volume V of metal in the ring varies directly as R and the square of r. If V = 2550 mm³ for r = 2.32 mm and R = 24.0 mm, find V for r = 3.50 mm and R = 32.0 mm. See Fig. 18.15.

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-R- Fig. 18.15