
The formula for heart rate can be given as :
[tex] Heart rate = \frac{Number of beats}{Time taken } [/tex]
Your heart rate is given by:
[tex] Heart rate = \frac{22}{20} [/tex]
[tex] Heart rate = \frac{11}{10} [/tex]
Your friend's heart rate is given by :
[tex] Heart rate = \frac{18}{15} [/tex]
[tex] Heart rate = \frac{6}{5} [/tex]