Jane covered a distance of 340 miles between city A and city taking a
total of 5 hours. If part of the distance was covered at 60 miles per
hour speed and the balance at 80 miles per hour speed, how many hours
did she travel at 60 miles per hour?

1) 2 hours 30 minutes
2) 3 hours
3) 2 hours
4) 1 hour 45 minutes