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Question

Calculate the length of tape required to encircle a circular ring of radius 10 cm.


  1. 62.85cm

  2. 65.24 cm

  3. None of these

  4. 70.32 cm


Solution

The correct option is A

62.85cm


Length of tape required is equal to the circumference of the circle
Circumference of the circle = 2πr

                                           = 2×π×10=20×227=62.85cm

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