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      Question

      The surface area of a sphere is

      given as (12474/25) cm². Calculate the diameter of the sphere. (Use π = 22/7)
      A 18.2 cm Correct Answer Incorrect Answer
      B 18.6 cm Correct Answer Incorrect Answer
      C 12.6 cm Correct Answer Incorrect Answer
      D None of these Correct Answer Incorrect Answer

      Solution

      ATQ,

      Let the radius of the sphere be 'r' cm. Surface area of sphere = 4 × π × r2 ATQ; r = 63/10 = 6.3 {Since, radius cannot be negative} So, diameter of the sphere = 6.3 × 2 = 12.6 cm

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