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Railways PYQCBT 1 2020

RRB NTPC · Question 23

A man walks around a circular pond exactly once. If his step is 44 cm long and he takes 700 steps to go around the pond, find the area of the pond.

  1. 6574 m^2

  2. 7456 m^2

  3. 7546 m^2

  4. 6546 m^2

Show answer & explanation

Answer: (C) 7546 m^2

Explanation

Circumference = 700 × 0.44 m = 308 m, so r = 308/(2 × 22/7) = 49 m. Area = 22/7 × 49² = 7546 m².