the volume of a rectangular prism can be given by the form
[tex]V= b*h*w[/tex]
you know Volume, base, and height but you dont know width
so divide b and h to both sides
[tex]\frac{V}{b*h} = w[/tex]
and you cna solve for width
now for 6.
dividing by a number is the same as multiplying by its reciprocal
[tex]n \div 6 = n * \frac{1}{6} [/tex]