Some friends are going to be driving to a city 900 miles away from home. They are planning to stay the night in a city 420 miles away, then drive the rest of the distance the following day. If they plan to drive on average 60 miles per hour, how long will they be driving the second day? Options
1. 8 hours
2. 22 hours
3. 23 hours
4. 6 hours

Thank you!