SOLUTION: At precisely noon, one plane leaves New York, heading for Orlanado,and another leaves Orlanado, heading for New York. The distance from New York to Orlando to 1300 mi. The plane fr

Algebra ->  Linear-equations -> SOLUTION: At precisely noon, one plane leaves New York, heading for Orlanado,and another leaves Orlanado, heading for New York. The distance from New York to Orlando to 1300 mi. The plane fr      Log On


   



Question 958743: At precisely noon, one plane leaves New York, heading for Orlanado,and another leaves Orlanado, heading for New York. The distance from New York to Orlando to 1300 mi. The plane from New York at 450 mph and the orlando plane flies at 490mph. When will the planes be12 mi apart?
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
You can think of this as 1 plane flying
at the sum of their speeds and the other
plane not moving. Then imagine that
the moving plane stops +12+ miles
short of destination
----------------------
+1300+-+12+=+%28+450+%2B+490+%29%2At+
+1288+=+940t+
+t+=+1.3702+|
+.3702%2A60+=+22.2128+
+.2128%2A60+=+12.766+
The planes will be 12 mi apart in
1 hr 22 min 13 sec
---------------------
check:
+1300+-+12+=+%28+450+%2B+490+%29%2A1.3702+
+1288+=+940%2A1.3702+
+1288+=+1287.988+
close enough