Question 1208726
Worded as joint and inverse variation problem.


You can take which way variables being assigned, but 

{{{h=(kv^3)/r}}}


Description for question means to keep k and v unchanged but want 3h.


{{{3h=(3kv^3)/r}}}


{{{3h=(kv^3)/(r/3)}}}
Showing that to use {{{1/3}}} of the original r value.