Simple interest on a certain sum is 36 over 25 of the sum. Find the rate per cent and time, if both are equal. Answers:
A) 8% and 8 years
B) 6% and 6 years
C) 10% and 10 years
D) 12 % and 12 years
E) None of these
36â„25P = PÃ—RÃ—R/100   â‡’ R^2 = 3600â„25 â‡’144=&gt; R = 12%   Also, time = 12 years   Answer 12 % and 12 years
<result>D</result>
Simple interest on a certain sum is 36 over 25 of the sum. Find the rate per cent and time, if both are equal.