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      Question

      Deepali invests Rs. 8,300 at a simple interest rate of 4%

      per annum for 6 years. The total amount she receives is Rs. '2k'. What is the product of the digits in 'k'?
      A 625 Correct Answer Incorrect Answer
      B 750 Correct Answer Incorrect Answer
      C 120 Correct Answer Incorrect Answer
      D 450 Correct Answer Incorrect Answer
      E None of these Correct Answer Incorrect Answer

      Solution

      ATQ,

      Simple interest = Principal Γ— Rate Γ— Time Γ· 100

      Interest = 8,300 Γ— 4 Γ— 6 Γ· 100 = Rs. 1,992

      2k = 8,300 + 1,992

      2k = 10,292

      k = 5,146

      Product = 5 Γ— 1 Γ— 4 Γ— 6 = 120

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