Question 455144
the times are given in minutes
the speed is mph
so convert time to hours
35 minutes = 7/12 hours
15 minutes = 1/4 hour
........

rate of car = r mph
rate of train = r+80 mph
........
distance = same
d=rt
7/12 * r = 1/4(r+80)
7r/12 = r/4 +20
7r/12-r/4 =20
LCD = 12
multiply by LCD
7r-3r=12*20
4r=240
r=60 mph  rate of car.
time = 7/12
d= rt
d= 7/12 * 60 = 35 miles.
.....
CHECK
speed of train = 140 mph
d= 1/4 *140=35 miles

m.ananth@hotmail.ca