Question

# At what rate percent per annum will a sum of money double itself in $$10\ years$$.

Solution

## As we know that,$$A = P \left( 1 + \cfrac{R \times t}{100} \right)$$Given:-A = 2 Pt = 10$$years$$R = ?$$Therefore,$$2P = P \left( 1 + \cfrac{10 \times R}{100} \right)2 - 1 = \cfrac{R}{10}\Rightarrow R = 10 \%Mathematics

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