The human body need a totall of 9 hours of sleep during the day or night to function correctly the next day.
they're human aren't they? so wouldn't the answer be how many hours of sleep does a human need? and the answer is about 8 hours.
Everyone was required 8 hours sleep a day, 8 glasses of water a day, for a complete function of the human body
human need 8-10 ours of sleep children need a little more 9-12 ours of sleep
Sleep requirements vary with age. The average best sleep for a normal adult is seven and one-half to eight hours.
every 90 minutes
On Uranus, a day lasts about 17 hours and 14 minutes. Therefore, you could potentially schedule your sleep according to this timeframe, depending on the local conditions and the human body's adaptability to a different sleep schedule.
How many hours does it sleep
Your brain needs 5 minutes of sleep. Your body needs 8 hours of sleep.
a normal human should get from 6-8 hours of sleep, when excercising it is best if you get your full 8 hours, but don't sleep over 10 hours, it will cause brain sleep, which is basicly being tired, and lazy and feeling like your brain is numb.
Adults are recommended to get 7-8 hours of sleep a day in order to allow their body to function properly.
The adult human body only needs 4 hours of continuous sleep to fully rejuvenate ... A child need much more as much as 8 - 10 hours of sleep .. All people differ, some require more sleep than others. There is no set minimum or maximum. The human body is largely self regulating in this respect. When you are tired you sleep more. I have added a link supporting my previous answer that 7-8 hours is the accepted norm for the 'average' adult.
if you mean how many hours you should sleep in a year it would be 3,650 hours of sleep for a regular year not a leap year