document.write( "Question 1158833: a man drives his car for 150 km travelling at his normal average speed. if he increases his speed by 10 km/h, he will arrive half an hour sooner. what is his original average speed? \n" ); document.write( "

Algebra.Com's Answer #781813 by josgarithmetic(39617) $\"\"$ $\"About$

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document.write( "              SPEED         TIME        DISTANCE\r\n" );
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document.write( "ORIGINAL         r          150/r         150\r\n" );
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document.write( "FASTER          r+10        150/(r+10)    150\r\n" );
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document.write( "DIFFERENCE                  \r\n" );
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\n" ); document.write( "\n" ); document.write( " $\"150%2Fr-150%2F%28r%2B10%29=1%2F2\"$ \n" ); document.write( "

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