document.write( "Question 1018280: An athlete runs up a set of stadium stairs at a rate of 2 stairs a second, turns around and descends those same stairs at a rate of 3 stairs per second. If the workout takes 90 seconds, how long does it take him to run UP the stairs. \n" ); document.write( "

Algebra.Com's Answer #634444 by josgarithmetic(39618) $\"\"$ $\"About$

You can put this solution on YOUR website!
RT=D travel rates rule
\n" ); document.write( "Time is seconds, distance in steps
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document.write( "             rate      time(seconds)      distance(how many steps)\r\n" );
document.write( "UP           2          d/2                  d\r\n" );
document.write( "DOWN         3          d/3                  d\r\n" );
document.write( "TOTAL                    90\r\n" );
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\n" ); document.write( " $\"d%2F2%2Bd%2F3=90\"$
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