If you brush your teeth 10 minutes a day how many hours do you brush in a year?
Answer: Approx. 152.083hrs brushing your teeth a year if you brushed ten minutes per day.
Explaination: There are 365 days in a year so you would multiply 10 times 365. That would result in 3,650 minutes per year. To convert that into hours you simply divide by 60 (3650/60). That gives you 152.083 hrs per year. Converting to hrs/mins/secs (if you wanted more accuracy), you would get approx 152 hrs 4 mins 58.8 seconds.