Post-UTME Mathematics 2015 Objective — Question 15
Question 15 of 40 from the Post-UTME Screening (Post-UTME) Mathematics 2015 Objective paper, with the correct answer and a full explanation.
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The rate of ice formation in the freezer compartment is (2-0.3t) g per min, where t is the time in minutes. If there was an initial 10g of ice in the ice-maker, the mass of ice present 10 minutes is
- A. 5g
- B. 10g
- C. 15gCorrect
- D. 25g
Explanation
Integrating (2-0.3t) from 0 to 10 gives 20-15=5g formed; total mass = 10+5 = 15g.
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