document.write( "Question 495562: two planes leave montreal at the same time to fly to chicago. one plane is traveling at 720km/h and the other at 750km/h. the faster plane arrives four minutes earlier than the other what is the distance between montreal and chcago? \n" ); document.write( "

Algebra.Com's Answer #336115 by stanbon(75887) $\"\"$ $\"About$

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two planes leave montreal at the same time to fly to chicago. one plane is traveling at 720km/h and the other at 750km/h. the faster plane arrives four minutes earlier than the other what is the distance between montreal and chcago?
\n" ); document.write( "--------------------------------
\n" ); document.write( "Fast plane DATA:
\n" ); document.write( "rate = 750 km/hr ; distance = x km ; time = d/r = x/750 hrs
\n" ); document.write( "----
\n" ); document.write( "Plow Plane DATA:
\n" ); document.write( "rate = 720 km/hr ; distance = x km; time = d/r = x/720 hrs
\n" ); document.write( "------
\n" ); document.write( "Equation:
\n" ); document.write( "time - time = 4/60 hr.
\n" ); document.write( "----
\n" ); document.write( "x/720 - x/750 = 1/15 hr
\n" ); document.write( "----
\n" ); document.write( "15*750x - 15*720x = 720*750
\n" ); document.write( "----
\n" ); document.write( "30*15x = 720*750
\n" ); document.write( "x = 24*50
\n" ); document.write( "x = 1200 km
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\n" ); document.write( "Cheers,
\n" ); document.write( "stan H.
\n" ); document.write( "==================
\n" ); document.write( " \n" ); document.write( "

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