Simple interest on a certain sum is 9 over 25 of the sum. Find the rate per cent and time, if both are equal.	Choose the most appropriate option:
A) 8% and 8 years  B) 6% and 6 years  C) 10% and 10 years  D) 6 % and 6 years  E) None of these
9â„25 P = PÃ—RÃ—R/100   â‡’ R2 = 900â„25 â‡’ R^2 = 36 R= 6   Also, time = 6 years   Answer 6 % and 6 years
<result>D</result>
Simple interest on a certain sum is 9 over 25 of the sum. Find the rate per cent and time, if both are equal.