Given that p varies as the square of q and q varies inversely as the...
MATHEMATICS
WAEC 2003
Given that p varies as the square of q and q varies inversely as the square root of r. How does p vary with r?
Explanation
\(p \propto q^2\)
\(q \propto \frac{1}{\sqrt{r}\)
\(p = kq^2\)
\(q = \frac{c}{\sqrt{r}}\)
where c and k are constants.
\(q^2 = \frac{c^2}{r}\)
\(p = \frac{kc^2}{r}\)
If k and c are constants, then kc\(^2\) is also a constant, say z.
\(p = \frac{z}{r}\)
p varies inversely as r.
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