SOLUTION: Andrea has three hours just been training for an upcoming race. She completes her training by running full speed the distance of the race and walking back the same distance to coo

Question 1083113: Andrea has three hours just been training for an upcoming race. She completes her training by running full speed the distance of the race and walking back the same distance to cool down. If she runs at a speed of 10 mph and walk back at a speed of 2 mph how long should she plan to spend walking back ?
Answer by jorel1380(3719) (Show Source): You can put this solution on YOUR website!
Let d be the distance of the race. Then:
d/10+d/2=3
d+5d=30
6d=30
d=5
Andrea runs for 1/2 an hour at 10 mph, and walks 2-1/2 hours at 2 mph, so she should plan to spend 2-1/2 hours walking back. ☺☺☺☺
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