Answers

2016-08-01T22:45:31+08:00
P=2(l+w);

l+w=90/2;
l=45-w....a
lw=450...b

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45-w)w=450;

45w-w^2=450;

w^2-45w+450=0

by QF;

W=[45+15]/2=30;
W=45-15]/2=10..PLEASE continue
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