The Ganga system:-
It is 2525 km long of which 1450km is in uttaranchal and up,445km Bihar and 520km in West Bengal.
The Ganga the head stream is contitutted of two main rivers bhagirathi And alaknanda ,which combine at devprayag to from gamga.
Before alaknanda meets bhagirathi at Devprayag to form ganga.
Mandakani meets alaknanda at rudraprayag.
Sources:-Bhagirathi from gomukh alaknanda from badrinath mandakini from kedarnath all from uttranchal.
Yamuna 1375 km is it's most most important tributary on right bank.
It arises at the yamunotri on glacier in uttranchal.it runs parallels to Ganga for 800km.and joins it in allhabad. Important tributories of yamuna are chambal 1050km,sind betwa 480km and Ken all from South.
The Brahmaputra system:-
It has a total length of 2900 km. It arises in tibet from chemayundung glacier where it is called Tsangpo, and enters the Indian territory in arunanchal Pradesh under the name Dihag.
Important tributories subsansari kameng dhansiri Manas teesta.
In Bangladesh Brahmaputra is known by the name of jamuna while Ganga gets the name Padma.their combined stream is known as padma only.
Meghna is the most important distributory before it enters the bay of Bengal.
On Brahmaputra is the river is the islands majuli in Assam the biggest river islands in the world.
