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In how many years will a sum of Rs.800 at 10% per annum compounded semi annually become Rs.926.10

1.5
2.5
3.5
4.5

Correct Answer: 1.5

Explanation:

Let the time be 'n' years, Then

$800 \times 1 + \frac{5}{100} 2 n = 926.10 < = > 1 + \frac{5}{100} 2 n = \frac{9261}{8000} < = > \frac{21}{20} 2 n = \frac{21}{10} 3$

n = 3/2 or n= 1 $\frac{1}{2}$ Years

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