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![Tuesday 17 January 2012 – Morning · dt = k(20 – x), where k is a constant. (i) Find dV dx, and hence show that πx dx dt = k. [4] (ii) Solve this differential equation, and hence](https://img.pdfslide.us/doc/110x75/5ec4d9fe87046f0b3427d718/tuesday-17-january-2012-a-morning-dt-k20-a-x-where-k-is-a-constant-i.jpg)
