Sleeping till 11 means it is really bad. because waking lately disturbs whole day. you wake at 11. you get fresh and all it may take 12 . So at that time you cannot have breakfast or lunch. whole day you will feel lazy and sleepy. You may not get sleep early at night.
This is okay for most people. But some have night duty and late shifts. They need to adjust their sleeping hours accordingly.
G. K. Ajmani Tax consultant http://gkajmani-mystraythoughts.blogspot.com/
it depends on your work you do ,if you have night shifts you have to sleep . but if not it is not gud for health to sleep till 11 am minimum 8 hours of sleep is needed.
