On day 1 you get rs 1, for a total of rs 1.
On day 2 you get rs 2, for a total of rs 3.
On day 3 you get rs 4, for a total of rs 7.
On day n you get rs 2^(n-1), for a total of rs (2^n)-1.
On day 30 you get rs 2^29, for a total of rs (2^30)-1.
On day 30 you get rs 536870912, for a total of rs 1073741824-1 = rs 1073741823.
If you mean how much money do you get on day 30, the answer is rs 536870912.
If you mean how much money do you get all together, as of day 30, the answer is rs 1073741823.