SOLUTION: A starts travelling from London to Paris at 8AM at 60mph. B starts following Aat 11am and catches A in 4 hours. What is Average speed of B?? Jane travels 60mph at 30mph and anot

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Question 1038783: A starts travelling from London to Paris at 8AM at 60mph. B starts following Aat 11am and catches A in 4 hours. What is Average speed of B??
Jane travels 60mph at 30mph and another 90mph at 30mph what is average velocity for entire trip
Answer by josgarithmetic(39626) About Me  (Show Source):
You can put this solution on YOUR website!
Choose to handle time quantities instead of points on a time line. 
                  SPEED      TIME      DISTANCE
traveler A         60         4+3        d
traveler B         r           4         d


Follow the description and examine how the data table matches.

system%28%2860%29%287%29=d%2C%28r%29%284%29=d%29

420=4r because the two expressions for d are equal.

r=21%2A2%2A2%2A5%2F%282%2A2%29

highlight%28r=105%29