How much time will it take for an amount of Rs. 450 to yield Rs. 81 as interest at 4.5% per annum of simple interest?

- 4 years
- 4.5 years
- 5 years
- 5.5 years

**Answer**

Simple Interest, SI = PRT/100

81*100 = 450*4.5*T

T = 4 years

**The correctÂ option is A.**