A river with 400 ppm of salt (a conservative substance) and a flow of 25.0 m3/s receives agricultural drainage of 5 m3/s with a 2,000 ppm salt concentration. The salts quickly become uniformly mixed and distributed in the river. At some point downstream, a city withdraws water and mixes it with pure water (water with 0 ppm salt) so that the combined water has exactly 500 ppm of salt. Calculate the minimum mixture ratio (X) of pure water to river water required to achieve this 500 ppm mixed salt concentration.
A river with 400 ppm of salt (a conservative substance) and a flow of 25.0 m3/s receives agricultural drainage of 5 m3/s with a 2,000 ppm salt concentration. The salts quickly become uniformly mixed and distributed in the river. At some point downstream, a city withdraws water and mixes it with pure water (water with 0 ppm salt) so that the combined water has exactly 500 ppm of salt. Calculate the minimum mixture ratio (X) of pure water to river water required to achieve this 500 ppm mixed salt concentration.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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A river with 400 ppm of salt (a conservative substance) and a flow of 25.0 m3/s receives agricultural drainage of 5 m3/s with a 2,000 ppm salt concentration. The salts quickly become uniformly mixed and distributed in the river. At some point downstream, a city withdraws water and mixes it with pure water (water with 0 ppm salt) so that the combined water has exactly 500 ppm of salt. Calculate the minimum mixture ratio (X) of pure water to river water required to achieve this 500 ppm mixed salt concentration.
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