Question 903080
Re TY, TY, typo started out a bit of a mess :)
 5950/r -5950/(r+75)= 3  |Multiplying thru by r(r+75) so as all denominators = 1
5950r + 75(5950)-+5950r = 3r(r+75)
3r^2 + 225r - 75(5950) = 0
 r^2 + 75r - 148,750 = 0 
(r+425)(r- 350) = 0(Tossing out the negative solution for unit measure)
r = 350mph, slower plane.  Faster plane 425mph {{{350+75}}}