document.write( "Question 924155: A train travels 110 km in the same time that a plane covers 385 km. If the speed of the plane is 30 km per hr less than 4 times the speed of the train, find both speeds. \n" ); document.write( "
Algebra.Com's Answer #560658 by MathTherapy(10552)\"\" \"About 
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\n" ); document.write( "\n" ); document.write( "A train travels 110 km in the same time that a plane covers 385 km. If the speed of the plane is 30 km per hr less than 4 times the speed of the train, find both speeds.
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document.write( "Let speed of train be S
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document.write( "Then speed of plane is: 4S – 30
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document.write( "Time it takes train to travel 110 km: \"110%2FS\"
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document.write( "Time it takes plane to travel 385 km: \"385%2F%284S+-+30%29\"
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document.write( "Since they cover their respective distances in the same amount of time, we then get:
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document.write( "\"110%2FS+=+385%2F%284S+-+30%29\"
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document.write( "110(4S – 30) = 385(S) ------- Cross-multiplying
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document.write( "440S – 3,300 = 385S
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document.write( "440S – 385S = 3,300
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document.write( "55S = 3,300
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document.write( "S, or speed of train = \"3300%2F55\", or \"highlight_green%2860%29\" km/h 
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document.write( "Speed of plane = 4(60) – 30, or 240 – 30, or \"highlight_green%28210%29\" km/h
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