Actually the solution is unique. The middle part with the Ys is the same and therefore can be omitted out. Now you are left with 2 equations and 2 unknowns.
I used time in minutes and I have x = 1.28, z = 0.30476 units (y can be found out). I guess the trick was 1. to write the equations that Yan did and 2. to recognize that the plain part is the same and hence can be cancelled. On Sep 14, 3:31 am, Yan Wang <[email protected]> wrote: > actually, there are many solutions, just pick up one from them... > > On Tue, Sep 14, 2010 at 3:23 AM, Abhilasha jain > > > > > > > > <[email protected]> wrote: > > how can u solve 3 variables using 2 equations? > > > On Tue, Sep 14, 2010 at 3:44 PM, Yan Wang <[email protected]> wrote: > > >> x/72 + y/64 + z/56 = 4 > >> & > >> x/56 + y/64 + z/72 = 4+2/3 > > >> find a solution to this ... > > >> On Tue, Sep 14, 2010 at 2:31 AM, bittu <[email protected]> wrote: > >> > Amazon Interview Question for Software Engineer / Developers > > >> > A car has speed of 72 64 56 in downhill, plain and uphill > >> > respectively . A guy travels in the car from Pt. A to pt. B in 4 Hrs > >> > and pt. B to pt. A in 4 Hrs and 40 min. what is the distance between A > >> > and B? > > >> > Regards > >> > Shashank > > >> > -- > >> > You received this message because you are subscribed to the Google > >> > Groups "Algorithm Geeks" group. > >> > To post to this group, send email to [email protected]. > >> > To unsubscribe from this group, send email to > >> > [email protected]. > >> > For more options, visit this group at > >> >http://groups.google.com/group/algogeeks?hl=en. > > >> -- > >> You received this message because you are subscribed to the Google Groups > >> "Algorithm Geeks" group. > >> To post to this group, send email to [email protected]. > >> To unsubscribe from this group, send email to > >> [email protected]. > >> For more options, visit this group at > >>http://groups.google.com/group/algogeeks?hl=en. > > > -- > > You received this message because you are subscribed to the Google Groups > > "Algorithm Geeks" group. > > To post to this group, send email to [email protected]. > > To unsubscribe from this group, send email to > > [email protected]. > > For more options, visit this group at > >http://groups.google.com/group/algogeeks?hl=en. -- You received this message because you are subscribed to the Google Groups "Algorithm Geeks" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/algogeeks?hl=en.
