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प्रश्न
In the lifespan of a 75-year-old person, how many times did the person's heart beat?
लघु उत्तर
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उत्तर
Assuming an average heart rate of 75 beats per minute: 75 × 60 × 24 × 365 × 75 = 2,956,500,000 beats. Thus, the heart beats approximately 3 billion times in 75 years.
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