SOLUTION: A dad travels 36 miles in 12 hrs. The son travels double in the same amount of time. Where was the son in 9hrs??? I'm guessing the son traveled double so 72 miles in 12 hrs but tha

Algebra ->  Customizable Word Problem Solvers  -> Travel -> SOLUTION: A dad travels 36 miles in 12 hrs. The son travels double in the same amount of time. Where was the son in 9hrs??? I'm guessing the son traveled double so 72 miles in 12 hrs but tha      Log On

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Question 437712: A dad travels 36 miles in 12 hrs. The son travels double in the same amount of time. Where was the son in 9hrs??? I'm guessing the son traveled double so 72 miles in 12 hrs but that about as far as i got.... :( thank you much!!!
Answer by Alan3354(69443) About Me  (Show Source):
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A dad travels 36 miles in 12 hrs. The son travels double in the same amount of time. Where was the son in 9hrs??? I'm guessing the son traveled double so 72 miles in 12 hrs but that about as far as i got.... :( thank you much!!!
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The dad is going 3 mi/hr (36/12)
The son is going 6 mi/hr
Their relative speed is 6-3 = 3 mi/hr
In 9 hours, they'll be 27 miles apart (9*3)
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In 9 hours, the son is 54 miles from the implied starting point (6*9)