IBA ফ্যাকাল্টি ভিত্তিক প্রস্তুতি
A boy agrees to work at the rate of one Taka on the first day, two Taka on the second day, and four Taka on third day and so on. How much will the boy get if he started working on the 1st of February and finishes on the 20th of February?