Question

If p varies as the cube of and q varies directly as the the square of r what is the relationship between paund r

Answer 1

The only way I can make sense of what you wrote is to interpret it as

p = mq^3
q = nr^2

p = m(nr^2)^3 = mn^3 r^6 = kr^k

p varies directly as the 6th power of r.