William left Missouri by 7:00 AM and arrived at his hometown by 8:00 PM. He had 3 stops of 25, 10 and 25 minutes respectively during the journey. How many hours did he spend on the road? Let's answer step by step:
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8:00 PM is equivalent to 20:00 hrs so he spent a total of 20 - 7 = 13 hours on the journey. He spent 25 + 10 + 25 = 60 minutes on stops. There are 60 minutes in an hour so he spent (60 / 60) = 1 hour on stops. Therefore, he spent 13 - 1 = 12 hours on the road. The answer: 12.
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