document.write( "Question 463048: bill begins a 17 mi snowboarding course at 40 mph. 3/5, by time, through the course, he blows out his knee and can only snowboard at 25 mph for the rest of the time . how long in minutes does it take bill to finish the course, start to finish? \n" ); document.write( "
Algebra.Com's Answer #317425 by lwsshak3(11628)\"\" \"About 
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bill begins a 17 mi snowboarding course at 40 mph. 3/5, by time, through the course, he blows out his knee and can only snowboard at 25 mph for the rest of the time . how long in minutes does it take bill to finish the course, start to finish.
\n" ); document.write( "...
\n" ); document.write( "x=minutes Bill takes to finish the course (total travel time)
\n" ); document.write( "distance=travel time * speed
\n" ); document.write( "at 40 mph, his travel time=(3/5)x=3x/5
\n" ); document.write( "at 25 mph, his travel time=(2/5)x=2x/5
\n" ); document.write( "3x/5*40+2x/5*25=17
\n" ); document.write( "24x+10x=17
\n" ); document.write( "34x=17
\n" ); document.write( "x=17/34=1/2 hour=30 min
\n" ); document.write( "ans:
\n" ); document.write( "Bill takes 30 minutes to finish the course
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