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1 to 2 hours a day is healthy.
10 to 11 year old girls need 8 full hours of sleep.
8 hours,,,...
12 hours
Children need 8 hours.
7-9 hours
9 - 10 hours
8 - 10 hours.
30+mins
About 10-12 hours
8 hours
about 8 to 10 hours of sleep