JAMB Mathematics 2010 Objective — Question 17
Question 17 of 50 from the Joint Admissions and Matriculation Board (JAMB) Mathematics 2010 Objective paper, with the correct answer and a full explanation.
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17. If y varies directly as the square root of x and y=3 when x=16. Calculate y when x=64. A. 3 B. 5.6 C. 5 D. 12
- A. 3
- B. 5.6
- C. 5
- D. 12Correct
Explanation
y=k.sqrt(x). 3=k.sqrt16=4k, k=3/4. y=(3/4)sqrt(64)=(3/4)x8=6.
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