Correct Answer: Option A

Explanation

t = \(\sqrt{(\frac{pq}{r} - r^2q)}\)

Take the square of both sides

t\(^2\) = \(\frac{pq}{r}\) - r\(^2\)q

t\(^2\) = \(\frac{pq - r^3q}{r}\)

cross multiply

rt\(^2\) = pq - r\(^3\)q = q(p - r\(^3\))

q = \(\frac{rt^2}{p - r^3}\)

There is an explanation video available below.

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