SOLUTION: You go north at 65 mph and i go south at 50 mph. How long until we are 230 miles apart? 575 miles apart?

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Question 1051977: You go north at 65 mph and i go south at 50 mph. How long until we are 230 miles apart? 575 miles apart?
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
You can think of this as one of us ( either one )
standing still and the other one moving at the sum
of our speeds
Let +t+ = time in hrs when we are +230+ mi apart
-----------------------
+230+=+%28+65+%2B+50+%29%2At+
+230+=+115t+
+t+=+2+ hrs
-----------------------
Let +t+ = time in hrs when we are +575+ mi apart
+575+=+115t+
+t+=+5+ hrs