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WAEC Agricultural Science 2000 Question 30

Question 30

Animal Nutrition

In a laboratory analysis of maize grains, the following results were obtained: I. The dry matter content of 80 percent made up of 30.0 parts carbohydrate, 3.3 parts ash, 13.8 parts fibre, and 1.7 parts protein. II. The remainder of the dry matter is oil. What is the percentage of oil in the dry matter?

  1. A.31.2
  2. B.39.0
  3. C.48.8
  4. D.64.0.
Show the answer and explanation

Answer: B (39.0)

Explanation

Oil = 80 − (30 + 3.3 + 13.8 + 1.7) = 31.2 parts; as a share of the dry matter: 31.2/80 × 100 = 39%.