• # question_answer Sumitra Aunt lent some money to her friends for 6 years, for which she received Rs. 2000 as interest. If her friends paid back a total of Rs, 12000/-, then what was the rate of interest? A)  $2\frac{1}{3}%$                     B)  $4\frac{1}{3}%$         C)  $6\frac{1}{3}%$                     D)  $3\frac{1}{3}%$

(d): $A=P+\frac{prt}{100}=12000\Rightarrow \frac{Prt}{100}=2000,where\,P=10000$ $\therefore 12000=10000\left( 1+\frac{6r}{100} \right)\Rightarrow \frac{6}{5}=1+\frac{6r}{100}$ $\Rightarrow \frac{1}{5}=\frac{6r}{100}\Rightarrow r=\frac{100}{30%}=3\frac{1}{3}%$