Question

in how many section does the northern plains have been divided

Answer 1

hi....

Punjab plains- it is formed by river indus and its tributaries
Ganga plains- it extents between gaaghar and teesta river.
Brahmaputra plains- they cover region between assam and arunachal pradesh

hope it helps u

Answer 2

The Northern Plains which are also known as Indo-Gangetic Plains.

1.Punjab Plains or Indus Plains, plains where Indus and it's tributaries flow, i.e. Punjab & parts of Gujarat, Jammu Kashmir in India, and Punjab, Khyber-Pakhtunwa, Sindh in Pakistan.
2. Ganga Plains, plains were Ganga and it's tributaries flow, i.e. Uttar Pradesh, Haryana, Delhi, Madhya Pradesh, Bihar, Jharkhand, West Bengal, & parts of Uttrakhand in India, and parts of Nepal & Bangladesh.
3.Brahmaputra Plains, Plains where the Brahmaputra and it's tributaries flow i.e. Anuranchal Pradesh, Assam in India, parts of Bhutan, Bangladesh.