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    • Question

      A certain sum of money amounts to ₹3360 at a rate of R%

      per annum under simple interest after 5 years, and to ₹3480 at a rate of 15% per annum under simple interest after 3 years. Find the total amount that would be received on the same principal at a rate of (R + 4)% per annum under simple interest after 4 years.
      A Rs 4134 Correct Answer Incorrect Answer
      B Rs 3760 Correct Answer Incorrect Answer
      C Rs 3552 Correct Answer Incorrect Answer
      D Rs 4126 Correct Answer Incorrect Answer
      E Rs 3680 Correct Answer Incorrect Answer

      Solution

      Let the principal = P
      [P(1 + 5*R/100]/[P(1 + 15*3/100)] = 3360/3480 = 28/29
      29(100 + 5R) = 28(100 + 45)
      5R = 140 - 100
      R = 8
      Now, Amount received after four years = P{1 + 4*(8 + 4)/100}]/[P(1 + 5*8/100] * 3360
      = 148*24 = ₹3552

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