SOLUTION: One morning, John drove 5 hours before stopping to eat. After lunch he increased his speed by 10 mph. If he completed a 430 mile trip in 8 hrs of driving time, how fast did he driv

Algebra ->  Algebra  -> Customizable Word Problem Solvers  -> Travel -> SOLUTION: One morning, John drove 5 hours before stopping to eat. After lunch he increased his speed by 10 mph. If he completed a 430 mile trip in 8 hrs of driving time, how fast did he driv      Log On

 Ad: Over 600 Algebra Word Problems at edhelper.com Ad: Algebrator™ solves your algebra problems and provides step-by-step explanations! Ad: Algebra Solved!™: algebra software solves algebra homework problems with step-by-step help!

 Word Problems: Travel and Distance Solvers Lessons Answers archive Quiz In Depth

 Click here to see ALL problems on Travel Word Problems Question 97911: One morning, John drove 5 hours before stopping to eat. After lunch he increased his speed by 10 mph. If he completed a 430 mile trip in 8 hrs of driving time, how fast did he drive in the morning?Answer by rajagopalan(158)   (Show Source): You can put this solution on YOUR website!Let the morning speed =x Driving time 5 hrs Distance covered = speedxtime =5x........D1 Post lunch travel time =8-5=3 Post lunch speed=x+10 Post Lunch Distance covered = speedxtime =3(x+10)=3x+30......D2 Total distance covered=D1+D2=5x+3x+30 But 5x+3x+30 = 430 8x+30=430 8x=430-30 8x=400 x=400/8=50 The speed in the morning = 50 mph