Question

If the frequency of human heart is $1.25$ Hz, the number of heart beats in $1$ minute is

• A. $65$
• B. $75$
• C. $80$
• D. $90$

Answer 1

Answer: (B)

$75$

Beat frequency of heart = $1.25$Hz.
$\therefore$ Number of beats in $1$ minute = $1.25\times 60=75$.