document.write( "Question 395322: A long distance trucker traveled 80 miles in one direction during a snow storm. The return trip in rainy whether was accomplished at double the speed and took 2 hours less time. Find the speed going? \n" ); document.write( "
Algebra.Com's Answer #280549 by jrfrunner(365)![]() ![]() You can put this solution on YOUR website! remember the relationship distance=rate*time or d=rt \n" ); document.write( "- \n" ); document.write( "going: 80 miles at speed r and time t 80=rt \n" ); document.write( "coming: 80 miles at speed 2r and time t-2 80=2r*(t-2) or 40=r(t-2)=rt-2r \n" ); document.write( "-- \n" ); document.write( "80=rt and 40=rt-2r \n" ); document.write( "40=80-2r \n" ); document.write( "2r=40 \n" ); document.write( "r=20 this is the going speed 20mph \n" ); document.write( " |