Simple interest on a certain sum is 9.8 over 20 of the sum. Find the rate per cent and time, if both are equal.
Select the correct option:
A) 7% and 7 years
B) 6% and 6 years
C) 10% and 10 years
D) 12 % and 12 years
E) None of these
9.8â„20 P = PÃ—RÃ—R/100   â‡’ R2 = 980â„20=49 â‡’ R = 7%   7% and 7 yearslso, time = 7 years   7% and 7 yearsnswer 7% and 7 years
<result>A</result>
Simple interest on a certain sum is 9.8 over 20 of the sum. Find the rate per cent and time, if both are equal.