Final answer:
If a person lives to be 90 years old, they would spend approximately 30 years asleep, assuming an average of 8 hours of sleep per night. This calculation is based on dividing the life span into thirds, with one-third dedicated to sleep, essential for human health and well-being.
Step-by-step explanation:
The question asks how many years of our lives we would spend sleeping if we lived for 90 years. On average, it is estimated that we spend about 1/3 of our lives sleeping. Given that there are 24 hours in a day, this means we typically spend 8 hours sleeping per night. To calculate the total number of years spent sleeping during a 90-year lifespan:
- Calculate the hours spent sleeping each day (8 hours).
- Multiply this by 365 days to find the number of hours slept in a year.
- Over 90 years, we would then multiply this yearly total by 90 to find the cumulative hours spent sleeping.
- Finally, divide this total number of hours by the number of hours in a year (24 hours/day × 365 days/year) to convert it into years.
This results in approximately 30 years spent sleeping if one lives to be 90 years old. The precise number can vary depending on individual sleep habits but this provides a general approximation.
It is essential to note that sleep is crucial for our health and survival. While some animals can survive with little to no sleep, humans require sufficient sleep to function properly, making those 30 years necessary for overall well-being.