A sum fetched total simple interest of ?4016.25 at the rate of 9 p.c.p.a. in 5 years.What is the sum?

?8925

?8032.50

?4462.50

?8900

None of these

Correct Answer : A

What will be the ratio of simple interest earned by certain amount at the same rate of interest for 6 years and that for 9 years?