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?
:
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 = {{{12/3}}}
s = 4 mph is L's walking speed
;
;
Check solution in dist equation
2(4) + .5(8) = 12