Darker lines further divide EKG graph paper every fifth square. Each large square measures 5 mm in height and width and represents a time interval of:
A) 0.20 seconds.
B) 0.10 seconds.
C) 0.4 seconds.
D) 0.12 seconds.

Question

Quizplus · Accepted Answer

Each large square on EKG graph paper represents 0.20 seconds. Each small square represents 0.04 seconds, and since there are 5 small squares in a large square, the time interval for a large square is 5 x 0.04 = 0.20 seconds.

Darker Lines Further Divide EKG Graph Paper Every Fifth Square