<PRE><B>Question 403088</B>
The IMPORTANT key is to realize that &quot;the ratio 5:2:4&quot; in this problem can be translated to mean

&quot;5 &#39;parts&#39;, 2 &#39;parts&#39;, 4 &#39;parts&#39;&quot;

the longest side is 15cm, so that means that 15cm = 5 &#39;parts&#39;

so 1 &#39;part&#39; = 3cm

the shortest side is 2 &#39;parts&#39; 

the perimeter is the sum of all sides = total of 11 parts 

so,

the shortest side is 6cm
the perimeter is 33cm</PRE>