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Discussion :: Simple Interest

  1. What is the sum which earned interest?

    I. 

    The total simple interest was Rs. 7000 after 7 years.

     II. 

    The total of sum and simple interest was double of the sum after 5 years.
    2. A.

    I alone sufficient while II alone not sufficient to answer
    B.

    II alone sufficient while I alone not sufficient to answer
    C.

    Either I or II alone sufficient to answer
    D.

    Both I and II are not sufficient to answer
    E.

    Both I and II are necessary to answer

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    Answer : Option E

    Explanation :

    Let the sum be Rs. x.

           

         I gives, S.I. = Rs. 7000 and T = 7 years.

           

        II gives, Sum + S.I. for 5 years = 2 x Sum          Sum = S.I. for 5 years.

     

    Now, S.I. for 7 years = Rs. 7000.

     

     

     S.I. for 1 year = Rs. \(\frac { 7000 } { 7 }\)  = Rs. 1000

     

    Thus, I and II both are needed to get the answer.

     

     Correct answer is (E)

     

     

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