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### Discussion :: Simple Interest

1. 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?

2.  A. 3.5 years B. 4 years C. 4.5 years D. 4.5 years

Explanation :

 Time = $$[\frac { 100*81 } { 450*4.5 } ]$$ years = 4 years.

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