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January 30, 2015

January 30, 2015

Posted by **gf** on Tuesday, November 6, 2007 at 11:54pm.

- maths -
**Reiny**, Wednesday, November 7, 2007 at 1:33amLet the speed of the passenger plane be x mph, then the speed of the jet is 2x mph

The both went for 4 hours, so the

passenger plane went 4x miles

the jet went 4(2x) or 8x miles

So isn't 4x+8x = 2400 ???

etc.

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