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SSC Quantitative Aptitude Simple Interest Question Bank Simple and Compound Interest (II)

  • question_answer
    Aru lent some money at the rate of simple interest of 6% for 8 yr. He received Rs. 312 less than its principal as a interest. The principal is

    A) Rs. 300

    B) Rs. 350

    C) Rs. 600

    D) Rs. 425

    Correct Answer: C

    Solution :

    [c] Let principal = Rs. P \[\therefore \] \[SI=\text{Rs}.(P-312),\] \[r=6%\]and \[t=8\,\,yr\]             \[\Rightarrow \]   \[SI=\frac{P\times r\times t}{100}\] \[\Rightarrow \]   \[P-312=\frac{P\times 6\times 8}{100}\] \[\Rightarrow \]   \[100P-31200=48P\] \[\Rightarrow \]   \[52\,P=31200\]\[\Rightarrow \]\[P=\text{Rs}.\,\,600\]


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