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The SI on a sum of money is $\frac{9}{16}$ of the sum. If the rate of interest is $\frac{9}{2}$ per annum, find the time.
Given: SI on sum of money is $\frac{9}{16}$SI of sum
Rate of interest is $\frac{9}{2}$
To do : Find the value of time
Answer
R = $\frac{9}{2}$ p.a. T = ?
Let the sum of money, P = Rs 100
SI on this sum = $\frac{9}{16} \times 100 = \frac{900}{16}$
= Rs $\frac{225}{4} = \frac{PTR}{100}$
$\frac{(100 \times T \times \frac{9}{2})}{100} = \frac{225}{4}$
T = $\frac{225}{4} \times {2}{9} = \frac{25}{2}$ = 12.5 years
So T$ = 12.5$ years
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