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SSC SSC CHSL TIER-I Solved Paper Held on 11.01.2017

  • question_answer
    Dalajit lent Rs. 10800 to Jaabir for 3 years and Rs. 7500 to Kabir for 2 years on simple interest at the same rate of interest and received Rs. 1422 in all from both of them as interest. The rate of interest per annum is

    A)  3.5 percent

    B)  4 percent

    C)  3 percent

    D)  4.5 percent

    Correct Answer: C

    Solution :

     Let the rate of interest be R% per annum. \[\text{S}\text{.I}\text{.= }\frac{\text{Principal }\!\!\times\!\!\text{ Time }\!\!\times\!\!\text{ Rate}}{\text{100}}\] \[\therefore \]\[\frac{10800\times 3\times R}{100}+\frac{7500\times 2\times R}{100}\]             \[=1422\] \[\Rightarrow \]\[324R+150R=1422\] \[\Rightarrow \]\[474R=1422\] \[\Rightarrow \]\[R=\frac{1422}{474}=3%\]per annum.


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