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) ![]() You can put this solution on YOUR website! 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 \n" ); document.write( " |