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SSC Sample Paper Mock Test-13 SSC CGL Tear-II Paper-1

  • question_answer
    At some rate of simple interest, A lent Rs. 6000 to B for 2 yr and Rs. 1500 to C for 4 yr and received Rs. 900 as interest from both of them together. The rate of interest per annum was

    A) 5%

    B)  6%    

    C)  8%

    D)  10%

    Correct Answer: A

    Solution :

    If rate of interest of R% per annum, then \[\text{SI=}\frac{\text{Principal}\,\text{ }\!\!\times\!\!\text{ }\,\text{Time}\,\text{ }\!\!\times\!\!\text{ }\,\text{Rate}}{\text{100}}\] \[\therefore \]\[\frac{6000\times 2\times R}{100}+\frac{1500\times 4\times R}{100}=900\] \[\Rightarrow \]\[120R+60R=900\] \[180R=900\]\[\Rightarrow \]\[R=\frac{900}{100}\]\[\Rightarrow \]\[R=5%\]


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