A bank offers 10% interest rate compounded annually. A person deposits Tk. 20,000 every year in his account. If he does not withdraw any amount, then how much balance will his account show after four years?

Tk. 20000 after 4 years = 20000{1 + (10/100)}⁴ =Tk. 29282
Tk. 20000 after 3 years = 20000{1 + 10/100)}³ =Tk. 26620
Tk. 20000 after 2 years = 20000{1 + 10/100)}² =Tk. 24200
Tk. 20000 after 1 years = 20000{1 + 10/100)}¹ =Tk. 22000
Total amount after 4 years = 29282 + 26620 + 24200 + 22000 = Tk. 102102