Correct Answer: Option B

Explanation

\(r \propto \frac{1}{\sqrt{s}}, r \propto \frac{1}{\sqrt{t}}\)

\(r \propto \frac{1}{\sqrt{s}}\) ..... (1)

\(r \propto \frac{1}{\sqrt{t}}\) ..... (2)

Combining (1) and (2), we get

\(r = \frac{k}{\sqrt{s} \times \sqrt{t}} = \frac{k}{\sqrt{st}}\)

This gives \(\sqrt{st} = \frac{k}{r}\)

By taking the square of both sides, we get

st = \(\frac{k^2}{r^2}\)

s = \(\frac{k^2}{r^{2}t}\)

There is an explanation video available below.

• What can i study with 155 score in science course? Answer this

  1 Answers   ·   Biology   ·   2 days ago
• what is the fluid in the eye calles? Answer this

  1 Answers   ·   Biological Science   ·   17 hours ago
• which school is the richest school in Nigeria? Answer this

  1 Answers   ·   1 day ago