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      Question

      The number of trees in a park increases by 12% every

      year. If the number of trees after 2 years will be 3,136, find the current number of trees in the park.
      A 2528 Correct Answer Incorrect Answer
      B 3320 Correct Answer Incorrect Answer
      C 1530 Correct Answer Incorrect Answer
      D 2500 Correct Answer Incorrect Answer

      Solution

      ATQ,

      Let, the present number of trees be ‘x’.

      ATQ,

      So, the number of trees after 2 years = 1.12 × 1.12 × x = 3136

      Or, x = 3136 × (1/1.12) × (1/1.12)

      So, x = 2,500

      Therefore, the current number of trees in the park = x = 2,500

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