# Let's Disc, Bros!

Calculus Level 4

Determine the volume of the solid obtained by rotating the region bounded by $$y=2\sqrt{x-1}$$ and $$y=x-1$$ about the line $$x=-1$$.

If your answer comes in form of $$\dfrac{p \pi} {q}$$, where $$p$$ and $$q$$ are co- prime integers, find the value of $$p-q$$ .

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