Question 271889
Joe can run twice as fast as Pete. They start at the same point and run in opposite directions for 40 minutes and the distance between them is then 16km. How fast does Joe run? 
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Joe DATA:
time = 2/3 hr ; rate = 2x km/h ; distance = rt = (2/3)(2x) = (4/3)x km
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Pete DATA:
time = 2/3 hr ; rate = x km/h ; distance = rt = (2/3)x km
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Equation:
distance + distance = 16 km
(4/3)x + (2/3)x = 16
2x = 16
x = 8 km/h (Pete's rate)
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2x = 16 km/h (Joe's rate)
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Cheers,
Stan H.
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