SOLUTION: An airline starts off on a trip with all engines running. It is going at a rate of 900 km per hour, after x hours it shuts down one engine and reduces its speed to 700 km per hour.

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Question 64717: An airline starts off on a trip with all engines running. It is going at a rate of 900 km per hour, after x hours it shuts down one engine and reduces its speed to 700 km per hour. The trip is a total of 3 hours long
How lonng should the pilot fly before shutting down one engine in order to go a total distance of 2352 in 3 hours.

Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
900x+%2B+700%283+-+x%29+=+2352
900x+%2B+2100+-+700x+=+2352
200x+=+252
x+=+1.26
The plane should fly 1.26 hrs before shutting down one engine
to go 2352 km in 3 hrs.
check
900x+%2B+700%283+-+x%29+=+2352
900%2A1.26+%2B+700%2A1.74+=+2352
1134+%2B+1218+=+2352
2352+=+2352
OK