Question 194484
{{{V=LWH}}} Start with the volume of a rectangular prism formula.



{{{120=4x*5}}} Plug in the volume of {{{V=120}}} and the length and height of {{{L=4}}} and {{{H=5}}}. We'll use "x" for the unknown width.



{{{120=20x}}} Multiply


 
{{{120/20=x}}} Divide both sides by 20 to isolate "x"



{{{6=x}}} Reduce



So the solution is {{{x=6}}} which means that the length is 6 meters.