document.write( "Question 544922: An automobile travels 240 miles in the same time in which a small plane travels 600 miles. Finds their speeds if the airplane is traveling 90mphs faster than the automobile. \n" ); document.write( "

Algebra.Com's Answer #355340 by mananth(16946) $\"\"$ $\"About$

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Car x mph
\n" ); document.write( "plane 90 faster = x+ 90
\n" ); document.write( "
\n" ); document.write( "Car 240 miles
\n" ); document.write( "plane 600 miles
\n" ); document.write( "Car time = plane time
\n" ); document.write( "t=d/r
\n" ); document.write( "240 / x = 600 /( x + 90
\n" ); document.write( "cross multiply
\n" ); document.write( "240 ( x + 90 ) = 600 x
\n" ); document.write( "240 x + 21600 = 600 x
\n" ); document.write( "600 x - 240 x = 21600
\n" ); document.write( "360 x = 21600
\n" ); document.write( "/ 360
\n" ); document.write( "x = 60 mph Car
\n" ); document.write( "
\n" ); document.write( "150 mph plane
\n" ); document.write( " \n" ); document.write( "

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