Gate2018 cs Q1

0. The area of a square is d. What is the area of the circle which has the diagonal of the square as its diameter?

  • Option : D
  • Explanation :

    Area of square = d
    Side one side of square = √d
    Diagonal of square = √(d+d) = √(2d)
    Area of circle = πr2
             = π(√(2d)/2)2
             = π(d/2)
             = (1/2)πd
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