উত্তর সিলেক্ট করলে সঠিক ও ভুল দেখাবে।
ব্যাখ্যা ও সঠিক সমাধান
উত্তর:
50
C = P(1 + r/n)nt [C = principal with interest, P = principal, r = rate of interest, n = number of times interest is compounded per time period, t = number of time periods]
Here, r = 10% = 10/100 = 0.1, n = 1, t = 2
Interest, I = C - P = P(1 + r/n)nt - P = P{(1 + r/n)nt - 1} = P{(1 + 0.1)1x2 - 1} = 0.21P
So, 0.21P = 10.5
or, P = 10.5/0.21 = 50 TK