SOLUTION: Joe and Sam are running on a jogging trail. Joe starts running 5 minutes after Sam does. If Sam runs at an average speed of 8ft/sec and Joe runs at an average speed of 9ft/sec, how
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Question 416586: Joe and Sam are running on a jogging trail. Joe starts running 5 minutes after Sam does. If Sam runs at an average speed of 8ft/sec and Joe runs at an average speed of 9ft/sec, how many minutes after Joe starts running will he catch up with sam? Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! Joe and Sam are running on a jogging trail.
Joe starts running 5 minutes after Sam does.
If Sam runs at an average speed of 8ft/sec and
Joe runs at an average speed of 9ft/sec,
how many minutes after Joe starts running will he catch up with sam?
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Joe DATA:
rate = 9 ft/sec ; time = x-300 sec ; distance = rt = 9(x-300) ft
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Sam DATA:
rate = 8 ft/sec ; time = x sec ; distance = 8x ft
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Equation:
distance = distance
9(x-300) = 8x
9x - 2700 = 8x
x = 2700 sec
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x = 2700/60 = 45 minutes (Sam running time)
x-300 = 2400/60 = 40 minutes (Joe's running time)
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Cheers,
Stan H.
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