Question:A sum of money becomes `8` times of itself in `3` years at compound interest. The rate of interest is : 

A `100%` 
B `8%` 
C `1%` 
D date inadequate 

+ Answer
A 

+ Explanation
P (1 + R/100)^3 = 8P`

`or (1 + R/100)^3`

`= 8 = 2^3`

`:. 1 + R/100 = 1`

`or R = 100`

+ Report

Irin Moni

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