Zahir, after joining to a new job, received a 10% Raise each year for 4 consecutive years. If his salary after the 4th raise is Tk. 30, what was his starting salary?

Zahir, after joining to a new job, received a 10% Raise each year for 4 consecutive years. If his salary after the 4^th raise is Tk. 30, what was his starting salary?

A Tk. 3150

B Tk. 3200