The difference between simple and compound interests on a certain sum for 2 years at 4% per annum is Rs.50. The sum is Select the correct option.
A) Rs.20,400	B) Rs.25,000	C) Rs.31,250	D) Rs.38,000	E) Rs.48,000
difference between 2yr CI and SI is given by PR^2 ..   PR^2= 50   P*R/100*R/100=50   P*4/100*4/100 =50   P=(50*100*100)/4*4   P= 31,250   ANSWER:Rs.31,250
<result>C</result>
The difference between simple and compound interests on a certain sum for 2 years at 4% per annum is Rs.50. The sum is