SOLUTION: A train is leaving in 11 minutes and you are one mile from the station. Assuming you can walk at 4 mph and run at 8 mph, how much time can you afford to walk before you must begi

Algebra ->  Equations -> SOLUTION: A train is leaving in 11 minutes and you are one mile from the station. Assuming you can walk at 4 mph and run at 8 mph, how much time can you afford to walk before you must begi      Log On


   

Question 839011: A train is leaving in 11 minutes and you are one mile from the station. Assuming you can walk
at 4 mph and run at 8 mph, how much time can you afford to walk before you must begin to
run in order to catch the train?

Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi,

Assuming you can walk at 4 mph 0r (1/15)mpm and run at 8 mph 0r (2/15)mpm

Let highlight_green%28x%29 represent how much time can you afford to walk

D = rt  

Question states: you are one mile from the station

%281%2F15%29mpm%2Ax+%2B+%282%2F15%29mpm%2A%2811-x%29+=+1mi  ||Multiplying thru by 15  so as all denominators = 1

%281%29mpm%2Ax+%2B+%282%29mpm%2A%2811-x%29+=+15mi

       x = 7 minutes, time can you afford to walk

CHECKING our answer***

+7%2F15+%2B+8%2F15++=+15%2F15+=+1mi

Wish You the Best in your Studies.