Question 863780
The length of a rectangle is k times its width, and the area of the rectangle is A square feet. Find the dimensions.


Let w= width
Dimensions are as variables, w and kw.


{{{w*kw=A}}}
{{{kw^2=A}}}
{{{w^2=A/k}}}
{{{w=sqrt(A/k)}}}
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The dimensions are width = {{{highlight(k*sqrt(A/k))}}} and length {{{highlight((k^2)*sqrt(A/k))}}}.


Your example uses k=5 and A=20.