Neco 2019 Agricultural Science Question 32
Practice objective / multiple choice question 32 from the 2019 Neco Agricultural Science examination.
A farmer harvests 500 kg of cassava roots with an initial moisture content of 70\% (wet basis). He intends to dry the roots in a solar dryer until the moisture content reaches 12\% (wet basis). The drying rate follows the law \( \frac{dM}{dt} = -k\,(M - M_{eq}) \) where \( M \) is the water mass (kg), \( M_{eq} \) is the equilibrium water mass corresponding to 10\% moisture (wet basis), and \( k = 0.05 \) h\(^{-1}\). Determine (i) the number of hours required to reach 12\% moisture, and (ii) the net profit if the market price of dried cassava is ₦150 per kg and the drying cost is ₦5 per hour.
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About This Question
This is Neco 2019 Agricultural Science Question 32. It is one of the objective questions from the 2019 Neco Agricultural Science examination.
Difficulty level: Hard .
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