Compound interest earned on a sum for the second and the third years are Rs.2000 and Rs.2500 respectively. Find the rate of interest? Choose the most appropriate option
A) 18% p.a.
B) 22% p.a.
C) 25% p.a.
D) 24% p.a.
E) None of these.
Rs.2500 - 2000 = Rs.500 is the interest on Rs.2000 for one year.   Rate of interest = (500/2000) / 100 = 25% p.a   ANSWER:25% p.a.
<result>C</result>
Compound interest earned on a sum for the second and the third years are Rs.2000 and Rs.2500 respectively. Find the rate of interest?