<PRE><B>Question 394678</B>
You jog at a speed of 6 miles per hour for 20 minutes, and you walk at a speed of 4 miles per hour for t minutes. If your combined jogging and walking distance is 3 miles, for how long did you walk?
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Jogging DATA:
rate = 6 mph ; time = 1/3 hr ; distance = (1/3)6 = 2 miles
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Walking DATA:
rate = 4 mph ; time = t/60 hrs ; distance = 4(t/60) = t/15 miles
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Equation:
dist + dist = 3 miles
2 miles + t/15 = 3 miles
t/15 = 1 
t = 15 (# of minutes you walked)
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Cheers,
Stan H.
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