24 per day, regardless of age.
They should have 8 or more hours of sleep in a day.
18 years = 157,784.63 hours.
A nine year should be getting 9-12 hours of sleep.
eighteen
Eighteen hours is less than twenty four, which is the length of one earth day. Eighteen hours is three-quarters of one earth day.
40 hours. You are an adult at 18 .
They can sleep for a couple of hours in the day and 12 hours at night.
One hour eighteen minutes
It depends on local legislation.
at least EIGHT FULL HOURS :]
16 and over need to get at least 8 hours sleep :)
As pm is noon - there are eight hours and eighteen minutes - assuming it is from noon to 8.18pm in the evening. If it is from noon to 8.18 am the following day, and using the 24 hour clock, then it would be twenty hours and eighteen minutes. Note: It is not precise enough in the question.