Waec Model Questions Vol1 2020 Geography Question 28
Practice objective / multiple choice question 28 from the 2020 Waec Model Questions Vol1 Geography examination.
A textile factory discharges 250 000 L of effluent per day containing a dye concentration of 150 mg/L. The plant can operate a treatment unit for only 8 hours a day at a flow rate of 30 000 L/h; the unit reduces the dye concentration by a fixed percentage p % for the treated portion. The remaining effluent is discharged untreated. Environmental regulations limit the total daily dye load to 30 kg. What is the minimum integer value of p (in percent) that must be achieved by the treatment unit to meet the regulation?
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About This Question
This is Waec Model Questions Vol1 2020 Geography Question 28. It is one of the objective questions from the 2020 Waec Model Questions Vol1 Geography examination.
Difficulty level: Hard .
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