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      Question

      A certain sum at certain rate % per annum simple

      interest becomes Rs 6300 in 2 years and Rs 6750 in 5 years. The principal and rate of interest are - Β  Β  Β 
      A Rs 5400 and 1.5% Correct Answer Incorrect Answer
      B Rs 6000 and 2.5% Correct Answer Incorrect Answer
      C Rs 4500 and 3% Correct Answer Incorrect Answer
      D Rs 5400 and 5% Correct Answer Incorrect Answer

      Solution

      According to the given information, interest of 3 years for that the given sum = 6750 – 6300 = 450 Therefore, the interest of 1 year for the same sum = 450/3 = Rs 150 Hence, required sum = 6300 – (150 Γ— 2) = 6000 Whereas, rate of interest = (150 Γ— 100)/(6000 Γ— 1) = 2.5%

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