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Discussion
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If a sum of money doubles itself in 10 years at simple interest, then what must be the rate of interest p.a.?

 
12%
10%
13%
Data inadequate

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Gaurav

M not able to understand the explanation of this ques

Abhishek Singh

Suppose if we take P=100 then SI must be 200, then using this data R would be 20%. Solve it by putting method instead.

Sandy Wilson

This is the wrong method i think,.. we are talking about per year so it will be 12.