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      Question

      Anil borrowed Rs. 7,200 at simple interest of 15% p.a. and

      Rs. 8,400 at simple interest of 12% p.a. The total interest he paid after β€˜y’ years is Rs. 8,352. Find the value of β€˜y’.
      A 4 yrs Correct Answer Incorrect Answer
      B 8 yrs Correct Answer Incorrect Answer
      C 2 yrs Correct Answer Incorrect Answer
      D 5 yrs Correct Answer Incorrect Answer

      Solution

      ATQ,

      7200 Γ— (15/100) Γ— y + 8400 Γ— (12/100) Γ— y = 8352

      Or, 1080y + 1008y = 8352

      So, y = (8352/2088) = 4

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