Waec Model Questions Vol1 2021 Agricultural Science Question 25
Practice objective / multiple choice question 25 from the 2021 Waec Model Questions Vol1 Agricultural Science examination.
A batch of 500 kg of cassava roots has an initial moisture content of 60 % (wet basis). In a solar dryer the moisture removal rate follows the law dM/dt = -k(M - EMC), where M is the moisture content (fraction), EMC is the equilibrium moisture content of 12 % (wet basis), and k = 0.05 h⁻¹. How many hours are required to reduce the moisture content to 15 % (wet basis)? Give your answer to one decimal place.
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This is Waec Model Questions Vol1 2021 Agricultural Science Question 25. It is one of the objective questions from the 2021 Waec Model Questions Vol1 Agricultural Science examination.
Difficulty level: Hard .
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