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a. A sum of money doubles itself in 4 ye...

a. A sum of money doubles itself in `4` years at a certain rate of interest. In how many years will it triple itself at the same rate of interest ?
b. A sum of money trebles itself in `6` years at a certain rate of interest. In how many years will it become four times itself at the same rate of interest ?

Text Solution

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The correct Answer is:
a. 8 years b. 9 years
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