# The difference in compound interest earned on a certain sum, for which interest is compounded annually, in the first and the second year is Rs.140. If the rate of interest becomes thrice the original rate, then the difference in the amount would be Option 1) Rs. 1000Option 2) Rs. 1260                Option 3)  Rs 1820          Option 4)   Rs. 2520Option 5) Rs. 420

R rishi raj

Difference of S.I and C.I for two years $=\frac{PR^{2}}{100^{2}}= i\! f r = 3r,$

$then=\frac{P9\left ( R^{2} \right )}{100^{2}}$

$it\: means\: 9\: times\: of \: D$

$140 \times 9 = 1260$

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