Jenna is planning a road trip. She plans on driving the first 200 miles, and her friend will drive the last 100 miles. They plan on taking 2 30-minute breaks. If Jenna drives 50 miles per hour and her friend drives 20 miles per hour, how many hours will they spend on the road trip? Let's answer step by step:
Jenna will drive 200 miles at a rate of 50 miles per hour, so she will drive for 4 hours. Her friend will drive 100 miles at a rate of 20 miles per hour, so Jenna's friend will drive for 5 hours. They will spend a total of 60 minutes on breaks because 30 minutes + 30 minutes = 60 minutes. Thus, they will spend 1 hour on breaks because there are 60 minutes in an hour. The road trip will take a total of 1 + 4 + 5 = 10 hours. The answer: 10.