Question 610770
  <pre><font face = "Tohoma" size = 3 color = "indigo"><b> 
Hi, 
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 lateral surface Area (4 sides) = 2lh + 2wh    ||Note square prism, l = w = h = x
     2x^2 + 2x^2 = 324
           4x^2 = 324
            x^2 = 81
             x = 9   (throwing out negative solution for length of a side)