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UI Post-UTME Mathematics 2018 (Model questions) Question 3

Question 3

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 how long it takes to cook a piece of meat of mass 1.2kg

  1. A.2hrs
  2. B.3hrs
  3. C.1hr 13mins
  4. D.2hrs 30mins
Show the answer and explanation

Answer: C (1hr 13mins)

Explanation

t = 40 × 1.2 + 25 = 73 minutes = 1 hr 13 mins.