The difference between compound interest and simple interest on a sum of Rs. 16,000 for two years is 160. Find the per annum rate of interest.
Answer & explanation
Correct answer: option 2
Let the rate of interest = r
The formula used: (CI - SI) for 2 years = P$\frac{(r^2)}{100^2}$
Here, P = 16000, CI - SI = 160
⇒ 160 = 16000$\frac{(r^2)}{100^2}$
⇒ 160 x 10000 = 16000 r2
⇒ r = 10%