3. lonsider the problem of pollution in the Lecke pollution în Burly Ovuffin. Assume the lake has a constent volum. @ Wbiti dows o dfferential eguation describeng the concentration v for vhe of pollution, wsing f ty for flow concentration at time t ond Cin for volume the lake of cCt) for g pollution fursther V= 2X106m², f =4X106 m/moron tind concentra tion entering lake. would it take for the lake weith ceencenbration how Lo pallurond below the of f 107 parts Im3 to duop sofity thresholol (4x1o 6 parti Im) : (1) enlors the loke. cnly fresh watir GiS water enlers tho lake has a polluhon Concentuation of 3 X10 parts Im3.

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