The Age of Hazrat Faatimah (Radhiyallahu Anha)
It is said that Hazrat Faatimah (Radhiyallahu anha) passed away on the 3rd of Ramadhan, 11 AH. She was 29 years old.
Some Ulama have mentioned that she was 30 years old and others have said 35. All the details are mentioned in Usdul Ghaabah.
If it is accepted that Rasulullah (Sallallahu alaihi wasallam) was 35 years old when she was born, then she would have been around 28-29 years old if she passed away in the 11th year of Hijrah. And this appears to be the correct view.
On the basis of those who said that she was 35 years old when she passed away, Rasulullah (Sallallahu alaihi wasallam) would have been 29 when she was born. But this view is not substantiated.
In Al-Istee’aab there is an incident mentioned which negates that she was 35 years old.
(Rasulullah Sallallahu Alaihi Wasallam Kee Saahbzaadiya)