‘Amazon is the world widest river but Ganges in India is only one mile broad in some areas.’
Please correct the sentence.
Thanks
The Amazon is the world’s widest river but the Ganges in India is only one mile broad in some areas.
This is a grammatical correction, but the two clauses do not seem to fit together well at all. Why do you say ‘only one mile broad’? Use of ‘only’ doesn’t seem to make sense. Near its source the Ganges would be narrower than that. (My research indicates around 500 yards wide) There are also places where it would be far wider (5 miles wide).
If you are trying to compare the two, and point out that the Ganges is a wide river, even though it is not as large as the Amazon, then you could say:
The Amazon is the world’s widest river but the Ganges in India is also broad, being 5 miles wide in some areas.
Note that the names of rivers, seas, oceans, mountain ranges, hills, valleys etc will be preceded by the definite article ‘the’. Hence the Amazon, the Ganges, the Brahmaputra, the Indus, the Mahanadi and so on. (Edited)
Not ‘apart from’ at all, as that was also corrected.

… . Not ‘apart from’ at all, as that was also corrected.
Edited now. (Be happy!)