SOLUTION: A jet plane, flying 120 mph faster than a propeller-driven plane, travels 2,700 miles in 6 hours less time than the propeller plane requires to fly the same distance. How fast does

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Question 446001: A jet plane, flying 120 mph faster than a propeller-driven plane, travels 2,700 miles in 6 hours less time than the propeller plane requires to fly the same distance. How fast does each plane fly?
Answer by jorel1380(3719) About Me  (Show Source):
You can put this solution on YOUR website!
2700/x-6=2700/x+120
2700(x+120)-6(x)(x+120)=2700x
2700x+324000-6x2-720=2700x
6x2-324000+720=0
6x2=323280
x2=53880
x=232.12
x+120=352.12
The propeller plane flies at 232.12 mph; the jet flies at 352.12 mph..