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Given that p varies directly as q while q varies inversely as r, which of...

Mathematics
WAEC 2000

Given that p varies directly as q while q varies inversely as r, which of the following statements is true?

  • A. r varies directly as p
  • B. p varies inversely as r
  • C. p varies directly as r
  • D. q varies inversely as p
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Correct Answer: Option B
Explanation

P varies directly as q means p = kq some constant k

q varies inversely as r means q = \(\frac{\text{m}}{\text{r}}\) for some constant m

Substituting the expression for q into the equation for p:

p =\(\frac{\text{km}}{\text{r}}\)

This shows that p varies inversely as r.
 

 


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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts