<PRE><B>Question 870507</B>
Height of platforms + technician = 7&#39; 6&quot; +8&#39;2&quot;&quot; +5&#39;8&quot;=20&#39;4&quot;

height of first platform = 8&#39;2&quot;

shadow of first plat form = 6&#39; 3&quot;

8&#39; 2&quot;/6&#39; 3&quot; = 20&#39;4&quot; /x 

98&quot;/75&quot; =244&quot;/x

x= 244+75/98

=244.8&quot;

divide by 12

20&#39; 
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