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# Simple Interest #11

 11. A sum of $₹14,000$ amounts to $₹22,400$ in $12$ years in simple interest. What is the rate of interest? A. $7\%$ B. $6\%$ C. $5\%$ D. $4\%$

Simple interest(SI) for $12$ years $=22400-14000=8400$
$\text{R}=\dfrac{100×\text{SI}}{\text{PT}}=\dfrac{100×8400}{14000×12}=5$