Question

In a sewage-treatment plant, a large concrete tank initially
contains 440 000 litres liquid and 10 000 kg fine suspended
solids. To flush this material out of the tank, water is pumped
into the vessel at a rate of 40 000 litres h- 1. Liquid containing
solids leaves at the same rate. Estimate the concentration of
suspended solids in the tank at the end of 5 h.

Answer 1

Answer:

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