Question 877621
You this should mean, that area A is a constant, and {{{wL=A}}}; and that {{{L=k/w}}} with k being another constant.


Using the variation equation, k=wL, which is the same as A.  Our area was understood to be a constant.  I will continue using A and not k.


L=25 when w=10.
{{{A=25*10}}}
{{{A=250}}}, the constant area in this example.


The variation equation can be stated as {{{highlight(L=250/w)}}}.