The compound interest at 10% per annum on certain amount of money for two years is Tk. 10.50. What is the principal amount in Tk.?

The compound interest at 10% per annum on certain amount of money for two years is Tk. 10.50. What is the principal amount in Tk.? Correct Answer 50

let, capital = x 1st year interest = x*10/100 = x/10 2nd year interest = (x + x/10)10/100 = 11x/100 ATQ, x/10 + 11x/100 = 10.5 = > x = 50
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