SOLUTION: On Saturday morning, Lynn walked for 2 hours and then ran for 30 minutes. If she ran twice as fast as she walked and she covered 12 miles altogether,then how fast did she walk?
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Question 268891: On Saturday morning, Lynn walked for 2 hours and then ran for 30 minutes. If she ran twice as fast as she walked and she covered 12 miles altogether,then how fast did she walk? Answer by ankor@dixie-net.com(22740) (Show Source):
You can put this solution on YOUR website! On Saturday morning, Lynn walked for 2 hours and then ran for 30 minutes.
If she ran twice as fast as she walked and she covered 12 miles altogether,then how fast did she walk?
:
Let s = L's walking speed
then
2s = L's running speed
:
Write a dist equation: dist = time * speed
:
Walk dist + run dist = 12 mi
2s + .5(2s) = 12
2s + 1s = 12
3s = 12
s =
s = 4 mph is L's walking speed
;
;
Check solution in dist equation
2(4) + .5(8) = 12
