Neco 2018 Agricultural Science Question 10
Practice objective / multiple choice question 10 from the 2018 Neco Agricultural Science examination.
A batch of cassava roots weighs 500 kg (wet basis) and has an initial moisture content of 70 % (wet basis). The desired final moisture content for safe storage is 15 % (wet basis). The drying follows the model \(M_t = M_e + (M_0 - M_e) e^{-kt}\), where \(M_t\) is the moisture content at time \(t\) (hours), \(M_0\) is the initial moisture content, \(M_e\) is the equilibrium moisture content (assumed 12 % wet basis), and \(k = 0.25\) h\(^{-1}\). Calculate the minimum drying time required to reach the target moisture content of 15 % (wet basis). Give your answer in hours, rounded to one decimal place.
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About This Question
This is Neco 2018 Agricultural Science Question 10. It is one of the objective questions from the 2018 Neco Agricultural Science examination.
Difficulty level: Hard .
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