Calculate the height of the rotating truncated cone with volume V = 1115 cm3 and a base radii r1 = 7.9 cm and r2 = 9.7 cm.
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it's formula; can be proved....https://math.stackexchange.com/questions/1626218/calculation-of-rise-in-height-of-water-in-a-frustum-of-right-circular-cone
can u explain why you do (r2 + rxR + R2) in the first step
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