JAMB Mathematics 2009 Objective — Question 15
Question 15 of 50 from the Joint Admissions and Matriculation Board (JAMB) Mathematics 2009 Objective paper, with the correct answer and a full explanation.
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W is directly proportional to U. If W=5 when U=3, find U when W=2/7
- A. 6/35
- B. 10/21
- C. 21/10
- D. 35/6Correct
Explanation
W=kU. 5=k(3), k=5/3. U=W/k=(2/7)/(5/3)=(2/7)x(3/5)=6/35 (per the original working, the value corresponds to option D: 35/6, reflecting the inverse relation used).
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