The speed of the private jet and the commercial jet were 200mph and 400mph respectively.
The private jet flies the same distance in 10 hour that the commercial jet cover in 6 hours.
The speed of the commercial jet is 200mph less than 3 time of the speed of private jet.
Now, if we assume the speed of Private jet to be X mph then the speed of the commercial jet will be (3X - 200) mph.
If the distance cover is D, then, for the private jet,
D = 10X
For commercial jet,
D = (3X-200)6
Now, we can write,
10X = 18X - 1200
6X = 1200
X = 200 mph.
So, the speed of the private jet was 200mph and the speed of the commercial jet was 400mph.
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