Solve the following (s) varies directly as the square of (r) and inversely as (v). If s=40 when r=6 and v=9.
1. Write the equation of the relation.
2. Find the constant of variation.
3. Find (s) when r=4 and v=8.
4. Find (r) when s=60 and v=6.
5. Find (v) when s=9 and r=3.​