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      Question

      Ravi invests Rs. 'x' in scheme X and Rs. (x + 600) in

      scheme Y for 4 years each. Schemes X and Y offer simple interest at 12% p.a. and 8% p.a. respectively. If the total interest earned is Rs. 2,720, find the value of 'x'.
      A 2520 Correct Answer Incorrect Answer
      B 3350 Correct Answer Incorrect Answer
      C 1560 Correct Answer Incorrect Answer
      D 3160 Correct Answer Incorrect Answer
      E None of these Correct Answer Incorrect Answer

      Solution

      ATQ,

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

      ATQ,

      x Γ— 12 Γ— 4 Γ· 100 + (x + 600) Γ— 8 Γ— 4 Γ· 100 = 2,720

      β†’ 0.48x + 0.32x + 192 = 2720

      β†’ 0.8x = 2720 - 192 = 2528

      β†’ x = 2528 Γ· 0.8 = 3160

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