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Question Number 133719 by leena12345 last updated on 23/Feb/21

Commented by leena12345 last updated on 23/Feb/21

$$help$$

Answered by bramlexs22 last updated on 24/Feb/21

$$\mathrm{V}=2\pi \underset{3}{\stackrel{9}{\int }}\mathrm{xy}\mathrm{dy}$$$$\mathrm{V}=2\pi \underset{3}{\stackrel{9}{\int }}\mathrm{y}(1+{(\mathrm{y}-6)}^2)\mathrm{dy}$$$$\mathrm{V}=2\pi \underset{3}{\stackrel{9}{\int }}(\mathrm{y}+\mathrm{y}{(\mathrm{y}-6)}^2)\mathrm{dy}$$$$\mathrm{V}=2\pi \left(144\right)=288\pi$$

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