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The area of a concrete pathway is 350sq.m. and its perimeter is 90m. What is the length and the width of the pathway?

2
by flormonte

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by flormonte

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350=lw;

l=350/w............1.)

90=2(l+w);

45=l+w;

l=45-w..............2.)

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l=350/w;

45-w=350/w;

-w^2+45w=350;

w^2-45w+350=0

by quadratic;

w-35)(w-10);

w=35; or w=10;

l=45-35

=10

or;

l=45-10

=35