Answer to Question #255588 in Linear Algebra for shyla

Question #255588

A tank can be filled by a pipe in 18 hours. Five hours after this pipe is opened, it is supplemented by a smaller pipe, which, by itself can fill the tank in 22 hours. Simultaneously, a drainpipe is opened, which, by itself, can completely empty the tank in 30 hours. Find the total time, measured from the opening of the larger pipe, to completely fill the tank. [Verify your answer by MATHEMATICA and attach the printout of the commands and output]

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