what is rate of interest if principal.amount be 400,simple interest 160 and time 2year.	Choose the correct choice from the following options:
A) 10
B) 12.5
C) 20
D) 12
E) 14.5

Rationale: s . i = ( p * r * t ) / 100 160 = 800 r / 100 r = 160 / 8 = 20 % answer c
Answer: C