which is best fr mba reva in Bangalore or SDM dharwad,kle hubli

Both the colleges are average college for management studies. The faculty, infrastructure are good in both infact a much better in Reva Management School.

The placements are average too. One if has has a good academic background and skills you can expect a package of 3-4 lakhs per year.
Some of the recruiting companies are:

TCS
Amazon
Wipro
Bata
IBM
L&T
Aricent

You can check the list here .
So I will suggest you to choose REVA.

All the best!