How long does a meningooma surgery take and how long is the hospital stay?

Dependent. This is dependent on the location of the meningioma, how large it is, if it's fully removable, and the patient's clinical status prior to surgery. I know you'd like a better answer- in an ideal case, if it goes really well and is really simple, then expect anywhere from 3-5 days. If there are difficulties, it could be 5 days and may last up to 3 weeks depending on the difficulties.