Question

A quantity p varies jointly with r and s. Which expression represents the constant of variation, k?

prs
StartFraction p Over r s EndFraction
StartFraction r s Over p EndFraction
p + r + s

Answer 1

B

Explanation:

edge 23

Answer 2

`\boxed{k=(p)/(r \ s) }`

Second option is correct.

Explanation:

We have been given that p varies jointly with r and s.

Thus, we can write it mathematically as

`p=krs`

Here, k is the constant of variation.

Now, we have to find the value of k.

Divide the above equation by rs

`(p)/(r \ s)=(kr\ s)/(rs)`

`k=(p)/(r s)`

Hence, the value of k is
`k=(p)/(r s)`

Second option is correct.