SOLUTION: 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 tak
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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? Answer by richwmiller(17219) (Show Source):
You can put this solution on YOUR website! Gaining speed 60-40= 20 mph
Head start 40*1.25 =50 miles
Time to catch up 50/20=2.5 hours
Algebraic solution
40(t+1.25)=60t
40t+50.0=60t
50.0=60t-40t
50.0=20t
t=2.5 hours to meet
Distance to meeting 2.5*60=150 miles
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