document.write( "Question 818402: Two search and rescue teams leave base at the same time looking for a lost boy. The first team on foot, heads north at 2mph; and the other, on horseback, head south at 4mph. How long will it take them to search a combined distance of 21 miles between them?
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Algebra.Com's Answer #492515 by TimothyLamb(4379)\"\" \"About 
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s = d / t
\n" ); document.write( "t = d / s
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\n" ); document.write( "t = 21/(2 + 4)
\n" ); document.write( "t = 21/6
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\n" ); document.write( "t = 3.5 hours
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