An amount of money at compound Interest grows up to Rs.3.840 In 4 years and up to Rs.3.936 In 5 years. Find the rate interest.
1). 2.5%
2). 2%
3). 3.5%
4). 2.05%
.Here, b – a = 5 – 4 = 1
B = Rs. 3,936, A = Rs. 3,840
R%= ($\frac{B}{A}-1)\times100$%
($\frac{3936}{3840}-1)\times100$%
$\frac{3936-3840}{3840}\times100$%
$\frac{96}{3840}\times100$%
= 2.5%
2. At what rate of compound interest per annum will a sum of Rs 20000 become Rs 25088 in 2 years?
6. The principal that yield a compound interest of Rs.420 during the second year at 5% per annum is
8. In what time will Rs.1000 amounts to Rs.1331 at 20% per annum compounded half-yearly