SOLUTION: Two planes just took off from St. Louis, MO. The first plane is traveling 2 times faster than the second plane. After traveling in the same direction for 4.5 hours, they are 468 mi
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Question 294817: Two planes just took off from St. Louis, MO. The first plane is traveling 2 times faster than the second plane. After traveling in the same direction for 4.5 hours, they are 468 miles apart. What is the average speed of each plane? Answer by Alan3354(69443) (Show Source):
You can put this solution on YOUR website! Two planes just took off from St. Louis, MO. The first plane is traveling 2 times faster than the second plane. After traveling in the same direction for 4.5 hours, they are 468 miles apart. What is the average speed of each plane?
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The difference is speed is 468/4.5 = 104 mph.
2 times faster is 3 times as fast.
r1 = 3r2
r1 - r1/3 = 104
2r1 = 312
r1 = 156 mph
r2 = 52 mph
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