SOLUTION: jennifer walks 4 miles in the same time she can jog 9 miles. If her jogging speed is 8 mph faster than her walking speed, how fast does she walk?
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Question 732987: jennifer walks 4 miles in the same time she can jog 9 miles. If her jogging speed is 8 mph faster than her walking speed, how fast does she walk? Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! jennifer walks 4 miles in the same time she can jog 9 miles. If her jogging speed is 8 mph faster than her walking speed, how fast does she walk?
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Walking DATA:
distance = 4 miles; rate = x mph ; time = d/r = 4/x hrs
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Jogging DATA:
distance = 9 miles ; rate = (x+8)mph ; time = d/r = 9/(x+8) hrs
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Equation:
time = time
4/x = 9/(x+8)
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4x + 32 = 9x
5x = 32
x = 6.4 mph (her walking rate)
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Cheers,
Stan H.
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