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Q.

The total duration of the cardiac cycle is 0.8 seconds. If a person is suffering from fever and his/her heartbeat rate increases to 85, the duration of each cardiac cycle will be

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a

0.8 seconds

b

0.5 seconds

c

1.4 seconds

d

0.7 seconds

answer is B.

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Detailed Solution

Normal heart rate =75 beats/minute i.e., 75 cardiac cycle in 60 seconds. So each cardiac cycle take 0.8 seconds.

If heart rate is 90, 1 cardiac cycle = 60850.7 seconds

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