document.write( "Question 1059913: a private plane takes 8 hours less to travel 960 km than a car. if the plane travels 3 times as fast as the car, what is the speed of the plane and the car? \n" ); document.write( "
Algebra.Com's Answer #674959 by Boreal(15235)\"\" \"About 
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car travels at x mph, and x*t=960km, so t for car=960/x.
\n" ); document.write( "plane travels at 3x mph
\n" ); document.write( "It takes the plane 960/3x hours to travel the distance.
\n" ); document.write( "That is 8 hours less than 960/x, which is the car's time.
\n" ); document.write( "Therefore, (960/3x)+8=960/x
\n" ); document.write( "multiply everything by 3x
\n" ); document.write( "960+24x=2880
\n" ); document.write( "24x=1920
\n" ); document.write( "x=80 km/h ANSWER (car)
\n" ); document.write( "3x=240 km/h ANSWER (plane)
\n" ); document.write( "It takes the plane 4 hours and it takes the car 12 hours.
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