I have developed the game it's a bowling game and the pricing which are displayed are in dollars. now if a user buying a coin i.e making an in-app purchase of 1$ for 10 coins now while making a payment the dollar is converted into Indian rupees as the user is from India and making a payment from India. How much money Apple will charge and how much money as a developer I will get in my bank?
How much money Apple will charge
Apple publishes conversion tables for in-app purchases. Those tables include net proceeds. Generally Apple takes around 30% in most cases. Currency conversions are fixed and aren't updated very often.
I believe revenue conversion charts are exampled in Section 2 of your Deveioper Program Agreement.