Height by width face = 10.5 * 13 =
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136.50 sq cm
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height by length face = 10.5 * 8 = 84 sq cmwidth by length face = 13 * 8 = 104 <span>sq cm </span> Since there are TWO of those faces, we get the total and multiply it by 2. Total = <span>324.50 sq cm * 2 </span>TOTAL AREA = 649 <span>sq cm </span> Source: http://www.1728.org/recsolid.htm