The amounts x 1 (t) and x 2 (t) of salt in the two brine tanks of Fig. 7.3.8 satisfy
The amounts x1(t) and x2(t) of salt in the two brine tanks of Fig. 7.3.8 satisfy the differential equations
where ki = r/ Vi as usual. In Problems 29 and 30, solve for x1 (t) and x2 (t), assuming that r = 10 (gal/min), x1 (0) = 15 (lb), and x2 (0) = 0. Then construct a figure showing the graphs of x1 (t) and x2 (t).
V1 = 50 (gal), V2 = 25 (gal)
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