Question 170839
we know the area of a rectangle is Length times Width which we will label L and W.  A=L*W
:
L=3W--->W=L/3
A=75
:
75=L(L/3)
:
{{{75=L^2/3}}}
:
{{{225=L^2}}}
:

{{{highlight(L=15)}}}length
:
{{{highlight(W=15/3=5)}}}width