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      Question

      A giant circular wheel has a diameter of 56 metres. In

      how many revolutions will the wheel cover a total of 52.8 km?
      A 310 Correct Answer Incorrect Answer
      B 330 Correct Answer Incorrect Answer
      C 340 Correct Answer Incorrect Answer
      D 300 Correct Answer Incorrect Answer

      Solution

      Radius of the giant wheel = 56 Γ· 2 = 28 metres Circumference of the giant wheel = 2 Γ— Ο€ Γ— radius = 2 Γ— (22/7) Γ— 28 = 176 metres So, number of rotations to cover 52.8 km i.e. 52800 metres = 52800 Γ· 176 = 300

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