Waec Model Questions Vol1 2018 Agricultural Science Question 23
Practice objective / multiple choice question 23 from the 2018 Waec Model Questions Vol1 Agricultural Science examination.
A batch of cassava chips has an initial moisture content of 45% (wet basis) and must be dried to a final moisture content of 12% (wet basis). The equilibrium moisture content is 8% (wet basis). Drying follows Newton's law: M_t - M_eq = (M_0 - M_eq) e^{-k t}. The dryer operates in two stages: for the first 30 minutes the drying constant k_1 = 0.04 min⁻¹, after which the constant changes to k_2 = 0.02 min⁻¹. How many total minutes are required to reach the target moisture content? Round to the nearest minute.
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About This Question
This is Waec Model Questions Vol1 2018 Agricultural Science Question 23. It is one of the objective questions from the 2018 Waec Model Questions Vol1 Agricultural Science examination.
Difficulty level: Hard .
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