MTBE (methyl tert-butyl ether) is added to gasoline to increase the oxygen content of the gasoline. MTBE is soluble in water to some extent and becomes a contaminant when the gasoline gets into surface or underground water. The gasoline used by boats has an MTBE content of 10%. The boats operate in a well-mixed flood control pond having the dimensions 3 km long, 1 km wide, and 3 m deep on the average. Suppose that each of the 25 boats on the pond spills 0.5 L of gasoline during 12 hr of daylight. The flow of water (that contains no MTBE) into the pond is 10 m3/hr, but no water leaves because the water level is well below the spillway of the pond. By how much will the concentration of MTBE increase in the pond after the end of 12 hr of boating?
Data: The specific gravity of gasoline is 0.72.
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