Conversion units

Question

A healthy human heart pumps about 70 ml of blood into the aorta with each beat. If the heart is beating at an average of 72 beats/minute, how many gallons of blood does it pump around your body in a year? I assume you are healthy and human.

Answer 1

(70 mL / 1 beat) x (72 beats / 1 min) x (60 min / 1 hr) x (24 hr / 1 day) x (365 days / 1 year) x (1 gal / 3785 mL) = 699,874 gal / 1 year