Question
How long will a sum of money take to double, if it is
invested in 9% p.a. simple interest?(approx).Solution
Rate =9% Let Principle =100 Amount =100×2=200 SI =A-P=200-100=100. T =SI ×100)/PR = (100×100) / 100×9 =10000/900 =11(1/9) years
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