Question 1136468
.
<pre>
The new perimeter = {{{P[new]}}} = 


    = L*(1+0.25) + W*(1+0.25) + L*(1+0.25) + W*(1+0.25) = (1+0.25)*(L + W + L + W) = 1.25*(24 + 18 + 24 + 18) = {{{1.25*P[old]}}} = 

    = 1.25*84 = 105 inches.       <U>ANSWER</U>
</pre>


<U>The lesson to learn from my post is THIS</U>


<pre>
    Under this <U>similarity</U> enlarging, the new perimeter to the old perimeter ratio is the same 

    as the ratio of the new side length to the old side length 
</pre>