Question 615045
Let speed of freight train be x mph - 160 miles
passanger train speed = x+18  --------250

time is same for both
t= d/r
250/(x+18) = 160/x

250x= 160(x+18)
250x= 160x+ 2880
250x-160x=2880
90x= 2880
/90
x=32 mph

 the speed of passenger train =32mph
the speed of freight train = 32+18 = 50 mph