Kim's car average 60 mph. Robert, who travels by greyhound bus, will average 50 mph and the train that barb is riding averages 80 mph. When should Kim, Robert, and Barb leave in order to arrive at a city 240 miles at 1:30 pm

Divide the distance by the miles per hour:

Kim: 240 miles / 60 miles per hour = 4 hours

Robert: 240 miles / 50 miles per hour = 4.8 hours = 4 hours 48 minutes

Barb: 240 miles / 80 miles per hour = 3 hours.

Now find the time they need to leave by subtracting the travel time from the arrival time:

Kim needs to leave at 9:30 am

Robert needs to leave at 8: 42 am

Barb needs to leave at 10: 30 am