the normal heart beat of man per minute
1. 60 to 80
2. 40to 60
3. 80 to 100
4. 45 to 90
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Answer:
1)60 to 80, the normal heart beat of man per minute is 72 per second..which means the answer must be option 1.
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Answer:
2/6=1/3
Explanation:
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