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UI Post-UTME Mathematics 2018 (Model questions) Question 4

Question 4

Algebraic Expressions

The time t (min) to cook meat is given by the formula t = 40m + 25 where m is the mass of the meat (kg).
Find the mass of a piece of meat which takes 2hrs 9min to cook

  1. A.1.5kg
  2. B.2.6kg
  3. C.3kg
  4. D.4kg
Show the answer and explanation

Answer: B (2.6kg)

Explanation

2 hrs 9 min = 129 min, so 40m = 104 and m = 2.6 kg.