Question

difference between ci and si on a certain sum of 2000 for 2 years is 12.8. the rate of interest is​

Answer 1

Answer:

8%

Step-by-step explanation:

principal = Rs.2000

difference = 12.8 = p(r/100)²

                    12.8 = 2000(r/100)²

                    (12.8/2000)*10000 = r²

                    64 = r²

                 => r = √64 = 8

rate of interest is 8%