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      Question

      A certain amount earns simple interest of Rs. 1420 after

      4 years. Had the interest been 5% more, how much more interest would it have earned?
      A Rs. 128 Correct Answer Incorrect Answer
      B Rs. 100 Correct Answer Incorrect Answer
      C Cannot be determined Correct Answer Incorrect Answer
      D Rs. 136 Correct Answer Incorrect Answer
      E None of these Correct Answer Incorrect Answer

      Solution

      When we solve this question, we find that we have two variables P (Principal) and R (Initial assumed rate of interest) in the R.H.S. of the SI equation. Therefore, the correct answer can't be determined.

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