document.write( "Question 1171125: A train leaves Station X and travels east at 30 km/h. Two hours later, another train leaves the same station and travels in the same direction on a parallel tract at 45 km/h. At what point will the faster train overtake the slower train?\r
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Algebra.Com's Answer #796024 by ikleyn(52798) $\"\"$ $\"About$

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document.write( "Let d be the distance from the starting point to the overtaking point \r\n" );
document.write( "(exactly the unknown value under the question).\r\n" );
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document.write( "For the first train, the travel time is    hours.\r\n" );
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document.write( "For the second train, the travel time is    hours.\r\n" );
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document.write( "The difference is 2 hours, according to the condition\r\n" );
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document.write( "     -  = 2  hours.\r\n" );
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document.write( "You got your basic equation to find the unknown distance d.\r\n" );
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document.write( "To solve the equation, multiply both sides by 90.  You will get\r\n" );
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document.write( "    3d - 2d = 180\r\n" );
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document.write( "       d    = 180.\r\n" );
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document.write( "ANSWER.  The overtaking point is in 180 miles from the station X.\r\n" );
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