if the ratio of s.i earned on certain amount on same rate is 4:5.what is the ratio of time?  Choose one
A) 1 : 2 B) 6 : 9 C) 4 : 5 D) 2 : 3 E) not possible to calculate

Rationale: s . i 1 / s . i 2 = [ ( p * r * t 1 ) / 100 ] / [ ( p * r * t 2 ) / 100 ] 4 / 5 = t 1 / t 2 ratio = 4 : 5 answer c
Answer: C