document.write( "Question 990391: The part of a bridge pier out of water is three times the length of the part under water. If the height of the pier above water is 30 feet, what is the length of the part under water? \n" ); document.write( "
Algebra.Com's Answer #610479 by ikleyn(52790)\"\" \"About 
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\n" ); document.write( "The condition says that the proportion is kept\r
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\n" ); document.write( "\n" ); document.write( "\"30%2Fx\" = \"3%2F1\".\r
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\n" ); document.write( "\n" ); document.write( "where x is unknown length of the underwater part of the pier. \r
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\n" ); document.write( "\n" ); document.write( "Hence,\r
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\n" ); document.write( "\n" ); document.write( "x = \"%2830%2A1%29%2F3\" = \"30%2F3\" = 10 meters.\r
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