Question 34377
Express trian  = 2x
Loacl train = x
Equation:
{{{50/x-50/2x=1}}}
50[(2x)-(x)]=(x)(2x)
50x=2x^2
2x^2-50x=0
x^2-25x=0
Factor:
x(x-25)=0
x=25
25(x)=50
Hence, one traint travels at 50mph and another at 25mph.
Paul.