Question 174029
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{{{L=2W}}}
{{{P=84cm}}}
then, {{{P=2L+2W}}}, working eqn:
{{{84=2(2W)+2W}}}
{{{84=4W+2W=6W}}}-------->{{{cross(84)14/cross(6)=cross(6)W/cross(6)}}}
{{{highlight(W=14cm)}}}
{{{L=2*14=highlight(28cm=L)}}}
Check via our working eqn:
{{{84cm=2*28+2*14}}}
{{{84=56+28}}}
{{{84cm=84cm}}} good
See the diagram ratio 2:1, being Length is twice the Width:
{{{drawing(300,300,-6,8.5,-3,3,line(-6,-1.5,-6,1.5),line(-6,1.5,6,1.5),line(6,1.5,6,-1.5),line(6,-1.5,-6,-1.5),locate(0,1.8,P=84cm),locate(6.3,0,W=14cm),locate(0,-1.8,L=56cm))}}}
Thank you,
Jojo</pre>