Posted by **Victoria** on Monday, October 15, 2012 at 9:30pm.

A passenger plane and a jet leave att the same time from the same airport,traveling in opposite directions. The jet travels at twice the speed of the passenger plane. they are 2400 mi apart in 4 hours. Find the speed of the passenger plane and jet.

- algebra 1 -
**Reiny**, Monday, October 15, 2012 at 10:41pm
speed of passenger ---- x mph

speed of jet -----------2x mph

they each went for 4 hours, so

distance covered by jet = 4(2x) = 8x

distance covered by pass = 4x

8x + 4x = 2400

12x = 2400

x = 200

passenger plane went 200 mph, and the jet went 400 mph

Just noticed that I answered the same question back in Nov of 2007

http://www.jiskha.com/display.cgi?id=1194411287

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