At 9am a train traveling 60 miles per hour leaves los angeles for san francisco, a distance of 400 miles. at noon a car traveling at an average speed of 40 miles per hour leaves san francisco for los angeles. at what time will the two vehicles pass each other

At noon the train has travelled 3*60 = 180 miles   towards san francisco so it has 220 more miles to go when the car starts its journey.the combined speed   of train and car is 60+40 = 100 mph   so the time taken to travel to the point where they pass =   220 / 100 = 2.2  hours.therefore   time when they pass each other is   12.00 + 2.2 hours   =     14.12 hours   or 12 minutes passed 2 pm.