What will be the stroke volume of a person with 6000 ml of cardiac output and 0.8 sec for each cardiac cycle?

Stroke volume = $\frac{\text{cardiac}\text{output}}{\text{Number}\text{of}\text{beats}\text{per}\text{minute}}$

Time per each cycle = 0.8 sec

Number of beats per minute = $\frac{\text{60}}{\text{0}\text{.8}}=75$beats

Stroke volume = $\frac{6000}{75}=80\text{ml}$