Engineering Board Exam Reviewer · Variation & Proportion · easy
If x varies directly as y and inversely as z, and x=14 when y=7 and z=2, find x when z=4 and y=16.
- 14
- 4
- 16
- 8
Answer
C. 16
Solution
k = xz/y = 14(2)/7 = 4. Then x = ky/z = 4(16)/4 = 16.
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