JEE Math Practice Question

Let $$a, a r, a r^2$$, ............ be an infinite G.P. If $$\sum\limits_{n=0}^{\infty} a r^n=57$$ and $$\sum\limits_{n=0}^{\infty} a^3 r^{3 n}=9747$$, then $$a+18 r$$ is equal to

1. A.27
2. B.38
3. C.31
4. D.46