16⁄25P = P×R×R/100
⇒ R2 = 1600⁄25 ⇒ R = 40⁄5 = 8%
Also, time = 8 years
Simple interest on a certain sum is 16 over 25 of the sum. Find the rate per cent and time, if both are equal.
1. 8% and 8 years
2. 6% and 6 years
3. 10% and 10 years
4. 12 % and 12 years
5. None of these