Question:The compound interest on Rs. `30000` at `7%` per annum for a certain period is Rs.`4347` 

A `2 years` 
B `2 1/2 years` 
C `3 years` 
D `4 years` 

+ Answer
A 

+ Explanation
Amount `= Rs.(30000 + 4347) `

`= Rs.3447`.

Let `30000 (1 + 7/100)^n`

`= 34347`

`or (107/100)^n`

`= 34347/30000`

`= 11449/10000`

`= (107/100)`

`:. n = 2 years`

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Irin Moni

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