SOLUTION: A train station is one third of a mile away, and Marc has three minutes to get there. How fast must he run to catch the train (in minutes per mile)?

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Question 308323: A train station is one third of a mile away, and Marc has three minutes to get there. How fast must he run to catch the train (in minutes per mile)?
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
A train station is one third of a mile away, and Marc has three minutes to get there.
How fast must he run to catch the train (in minutes per mile)?
:
let s = the required speed (min/mile)
:
Dist/speed = time
1%2F3
--- = 3
s
:
Multiply both sides by s
:
1%2F3 = 3s
divide both sides by 3
s = 1%2F%283%2A3%29
s = 1%2F9 mi/min
:
:
Check this: 3 min * 1%2F9 = 3%2F9 = 1%2F3