document.write( "Question 452526: A rectangular prism with a square base has a lateral area of 96 square yards and a surface area of 128 square yards. What is the length of a base edge? \n" ); document.write( "
Algebra.Com's Answer #311069 by pedjajov(51)\"\" \"About 
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Rectangular prism with the square as a base has:
\n" ); document.write( "- 2 bases, each is square with side a
\n" ); document.write( "- 4 lateral faces, each rectangular with 2 sides equal to a (each belonging to the base) and two sides equal to the height of the prism equal to h
\n" ); document.write( ":
\n" ); document.write( "Area of such base is
\n" ); document.write( "\"B=a%5E2\"
\n" ); document.write( ":
\n" ); document.write( "Area of such lateral face is:
\n" ); document.write( "\"F=ah\"
\n" ); document.write( ":
\n" ); document.write( "Surface area is sum of all areas of all 6 faces: 2 bases and 4 lateral faces
\n" ); document.write( "\"S=2B%2B4F\"
\n" ); document.write( "\"S=2a%5E2%2B4ah\"
\n" ); document.write( ":
\n" ); document.write( "Lateral area consists of area of four lateral faces:
\n" ); document.write( "\"L=4F\"
\n" ); document.write( "\"L=4ah\"
\n" ); document.write( ":
\n" ); document.write( "So we have:
\n" ); document.write( "\"S=128\"
\n" ); document.write( "\"L=96\"
\n" ); document.write( "\"S-L=128-96=32\"
\n" ); document.write( ":
\n" ); document.write( "\"2a%5E2%2B4ah-4ah=32\"
\n" ); document.write( "\"2a%5E2=32\"
\n" ); document.write( "\"a%5E2=16\"
\n" ); document.write( "\"a=sqrt%2816%29\"
\n" ); document.write( "\"a=4\"
\n" ); document.write( ":
\n" ); document.write( "Length of the base edge is 4 yards.
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