Question

उस समयावधि को ज्ञात करें, जिसमें ₹ 1000 के मूलधन पर
वार्षिक 10% ब्याज दर से ₹ 331 का चक्रवृद्धि ब्याज प्राप्त
हुआ था।​

Answer 1

Step-by-step explanation:

Let the required time be n years.

Given: P = ₹ 1000, CI = ₹ 331

$\therefore A = P + CI = 1000+331= Rs. 1331\\</p><p>\because A =P(1+\frac{r}{100})^n\\</p><p> \therefore 1331=1000(1+\frac{10}{100})^n\\</p><p>\therefore \frac{1331}{1000}= (1+0.1)^n\\</p><p>\therefore 1.331 = (1.1)^n\\</p><p>\therefore (1.1)^3 = (1.1)^n\\</p><p>\huge \boxed {\implies n = 3}$

Thus, required time is 3 years.