document.write( "Question 396075: Joe and Sam have received walkie-talkies for their birthdays. If they leave from the same point at the same time, Joe walking north at 2.5 mph and Sam walking east at 3 mph, how long will they be able to talk to each other if the range of the walkie-talkies is 4 mi. Round your answer to the nearest minute. \n" ); document.write( "
Algebra.Com's Answer #281050 by mananth(16946)\"\" \"About 
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Joe and Sam have received walkie-talkies for their birthdays. If they leave from the same point at the same time, Joe walking north at 2.5 mph and Sam walking east at 3 mph, how long will they be able to talk to each other if the range of the walkie-talkies is 4 mi. Round your answer to the nearest minute.\r
\n" ); document.write( "\n" ); document.write( "..
\n" ); document.write( "Joe- 2.5 mph
\n" ); document.write( "Sam - 3mph
\n" ); document.write( "time they walk is the same
\n" ); document.write( "let the time be t
\n" ); document.write( "2.5t -- joe distance
\n" ); document.write( "3t ----- same distance
\n" ); document.write( "..
\n" ); document.write( "they are walking at right angles
\n" ); document.write( "use pythagoras theorem
\n" ); document.write( "(2.5t)^2 +(3t)^2=4^2
\n" ); document.write( "6.25t+9t=16
\n" ); document.write( "15.25t=16
\n" ); document.write( "t = 16/15.25
\n" ); document.write( "time = 1.08 hours\r
\n" ); document.write( "\n" ); document.write( "...
\n" ); document.write( "m.ananth@hotmail.ca \n" ); document.write( "
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