Both S.I. and C.I. is calculated with a similar rate of 10% per annum on a sum of rupees. If C.I. is calculated yearly for two years, then for what period must S.I. be evaluated such that S.I. = C.I.?

Both S.I. and C.I. is calculated with a similar rate of 10% per annum

1.	Both S.I. and C.I. is calculated with a similar rate of 10% per annum on a sum of rupees. If C.I. is calculated yearly for two years, then for what period must S.I. be evaluated such that S.I. = C.I.?
A.	4.2 years
B.	2.1 years
C.	1.1 years
D.	1.4 years
Answer» C. 1.1 years