document.write( "Question 1159329: Bert traveled 72 miles across the state through rain at a reasonable speed. If it had been sunny, he would have driven an average of 20 miles per hour faster, and would have arrived at his destination 24 minutes sooner. How long did his trip take him in the rain? How fast was he driving in the rain?
\n" ); document.write( "Hint: First solve a quadratic equation. Then write two equations with two unknowns. \n" ); document.write( "

Algebra.Com's Answer #782313 by josgarithmetic(39620) $\"\"$ $\"About$

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document.write( "                 SPEED       TIME        DISTANCE\r\n" );
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document.write( "IN RAIN           r          72/r           72\r\n" );
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document.write( "IF SUNNY         r+20        72/(r+20)      72\r\n" );
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document.write( "DIFFERENCE                  \r\n" );
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\n" ); document.write( " $\"72%2Fr-72%2F%28r%2B20%29=2%2F5\"$ \r
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\n" ); document.write( " $\"r%5E2%2B20r-3600=0\"$ \r
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\n" ); document.write( "\n" ); document.write( " $\"highlight%28r=-10%2B10%2Asqrt%2837%29%29\"$ about 50.83.
\n" ); document.write( " and you can evaluate the time from this. \n" ); document.write( "

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