SOLUTION: Ted allots three hours for his walking -running exercise once a week, wherein he covers a total distance of 15km.If his speed rate in walking is 3 kph and his running speed is 12kp

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Question 1067954: Ted allots three hours for his walking -running exercise once a week, wherein he covers a total distance of 15km.If his speed rate in walking is 3 kph and his running speed is 12kph, then how much does he cover running? Walking?
Answer by josgarithmetic(39620) About Me  (Show Source):
You can put this solution on YOUR website!
Constant Travel Rates Rule, RT=D to relate rate, time, distance 
          SPEED       TIME         DISTANCE

WALK         3         x%2F3            x

RUN         12         y%2F12          y
        
TOTAL                    3            15


system%28x%2F3%2By%2F12=3%2Cx%2By=15%29
Solve the system: x for distance walked, y for distance ran.