Question 873960
speed of doctor's train be x

leaves at 8.00 meets husbad  at 4.00 time = 8 hours

husband speed = (x+18)
husband time = 6 hours

distance is same

6(x+18)=8x

6x+108=8x

2x=108
x=54 mph

doctor's train 54 mph
Husband's train 54+18 = 72 mph

distance = 54 *8 = 432 miles