Waec Model Questions Vol1 2021 Agricultural Science Question 30
Practice objective / multiple choice question 30 from the 2021 Waec Model Questions Vol1 Agricultural Science examination.
A farmer harvests 10,000 kg of fresh cassava roots with an initial moisture content of 70% (wet basis). He wants to dry the roots to a final moisture content of 10% (wet basis) using a kiln that removes moisture at a rate proportional to the difference between the current moisture content and the equilibrium moisture content of 5% (wet basis). The proportionality constant is k = 0.03 h⁻¹ and the drying follows dM/dt = -k(M - Me), where M is the moisture content expressed as kg water per kg dry matter and Me corresponds to 5% wet basis. Estimate the drying time required (in hours) to reach the target moisture content.
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About This Question
This is Waec Model Questions Vol1 2021 Agricultural Science Question 30. It is one of the objective questions from the 2021 Waec Model Questions Vol1 Agricultural Science examination.
Difficulty level: Hard .
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