Once day every week, I swim and run for an hour each. I wondered how many calories I burned during that two hour period?

I timed my self and ran for 10 minutes and swam for 10 minutes. I ran at a rate of 321 feet per minute so I ran 3210 ft in ten minutes. I swam at a rate of 200 feet per minutes so I ran 2000 ft in ten minutes. To find the amount I run in a hour I multiply by 6(60 minute in a hour divided by 10 minutes) to the amount I run and swim in ten minutes. I got that I run 18720 ft in a hour and I swim 12000 ft in a hour. Running at a rate of 18720 ft in an hour(3.5 miles per hour), I burn a total of 3120 calories because per minute I run I burn 6 calories. Swimming at a rate of 12000 ft in a hour (2.27 miles per hour), I burn 1500 calories because per minute I swim I burn 8 calories. So in the end I burn 1500+3120=4620 calories in 2 hours.