document.write( "Question 923989: john left his house at 2:00 PM with an average speed of 40 kph. His brother, Francis left their house at 3:15 PM, driving 60 kph in the same direction as John. How long will it take Francis to overtake John? How far is it from their house? \n" ); document.write( "
Algebra.Com's Answer #560525 by richwmiller(17219)![]() ![]() You can put this solution on YOUR website! Gaining speed 60-40= 20 mph \n" ); document.write( "Head start 40*1.25 =50 miles \n" ); document.write( "Time to catch up 50/20=2.5 hours \n" ); document.write( "Algebraic solution \n" ); document.write( "40(t+1.25)=60t \n" ); document.write( "40t+50.0=60t \n" ); document.write( "50.0=60t-40t \n" ); document.write( "50.0=20t \n" ); document.write( "t=2.5 hours to meet \n" ); document.write( "Distance to meeting 2.5*60=150 miles \n" ); document.write( "code drtch1 \n" ); document.write( " \n" ); document.write( " |