document.write( "Question 216049: two friends start walking in opposite directions one walks 5mph the other walks 4mph they are talking on radios with a 20mi radius how long can they talk?\r
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Algebra.Com's Answer #163198 by ankor@dixie-net.com(22740)\"\" \"About 
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two friends start walking in opposite directions one walks 5mph the other walks 4mph they are talking on radios with a 20mi radius how long can they talk
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\n" ); document.write( "They can talk until they are more than 20 mi apart
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\n" ); document.write( "Let t = how long they can talk
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\n" ); document.write( "Write a distance equation dist = speed * time
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\n" ); document.write( "5t + 4t = 20
\n" ); document.write( "9t = 20
\n" ); document.write( "t = \"20%2F9\"
\n" ); document.write( "t = 2\"2%2F9\" hrs or 2 hr and \"2%2F9\"*60 = 13.33 min
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\n" ); document.write( "Check (20/9) ~ 2.22 hrs:
\n" ); document.write( " 4(2.22) + 5(2.22) =
\n" ); document.write( "8.88 + 11.10 = 19.98 ~ 20 mi\r
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