What will be the net pay of pay scale rs 9300 34800 plus grade pay of rs 4200 can anybody explain it properly this scale is for central govt job staff selection commission?

Rs 9300 is the starting basic pay which will rise upto Rs 34800 max. till you hold the same post in lifetime until and unless your are promoted to the next level.

Now lets get to the calculation....

Gross monthly salary = Basic Pay + D.A(45% of basic) + Grade pay + allowances(HRA/conveyance/food/travelling etc. etc)

So it comes to , Gross monthly salary = 9300 + 4185 + 4200 + ....

= 17685 + allowances