Browse Questions

# What is the duration of one cardiac cycle in man when the heart beats for 75 times per minute?

$\begin {array} {1 1} (1)\;0.3\: seconds & \quad (2)\;0.4\: seconds \\ (3)\;0.8\: seconds & \quad (4)\;0.5\: seconds \end {array}$

(3) 0.8 seconds