document.write( "Question 1121844: Hi
\n" ); document.write( "mr Teo travelled at 40km per hour from A to B.if he increased his speed to 70km per hour, he would take 6 hours less to reach B. What was the distance between A and B.\r
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Algebra.Com's Answer #737850 by MathTherapy(10552) $\"\"$ $\"About$

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Hi
\n" ); document.write( "mr Teo travelled at 40km per hour from A to B.if he increased his speed to 70km per hour, he would take 6 hours less to reach B. What was the distance between A and B.\r
\n" ); document.write( "\n" ); document.write( "thanks
\n" ); document.write( "

Let D be the distance
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document.write( "Then we get the following TIME equation: 
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document.write( "7D = 4D + 1,680 ------ Multiplying by LCD, 280
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document.write( "7D - 4D = 1,680
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document.write( "3D = 1,680
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document.write( "D, or distance =  \n" );
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