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      Question

      A sum of Rs. 9,600 earns a simple interest of Rs. 1,920

      in 2 years at a certain annual rate. What will be the simple interest on Rs. 12,000 for 4 years at the same rate?
      A Rs.1,200 Correct Answer Incorrect Answer
      B Rs.4,800 Correct Answer Incorrect Answer
      C Rs.2,250 Correct Answer Incorrect Answer
      D Rs.2,630 Correct Answer Incorrect Answer
      E None of these Correct Answer Incorrect Answer

      Solution

      Let the rate of interest be 'R%' p.a. ATQ, 9600 Γ— (R/100) Γ— 2 = 1920 β‡’ R = 1920 Γ· 192 = 10 Now, required interest = 12000 Γ— (10/100) Γ— 4 = 12000 Γ— 0.4 = Rs. 4,800

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