The difference between the simple interest and the compound interest (compounded yearly)earned on a sum of money at the end of four years at the rate of 10 percent per annum is Rs.256.40. Find the sum. Choose the correct choice from the following:
A) Rs.6,000  B) Rs.4,000  C) Rs.5,000  D) Rs.4500  E) Rs.5500
SI=(P*10*4)/100= 4p/10   CI=P(1+10/100)^4-P =4641P/100   CI-SI=   4641P/100-4P/100=256.40   P=4000   ANSWER:Rs.4,000
<result>B</result>
The difference between the simple interest and the compound interest (compounded yearly)earned on a sum of money at the end of four years at the rate of 10 percent per annum is Rs.256.40. Find the sum.