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Railways PYQCBT 2 2017

RRB NTPC · Question 33

A circular ground of radius 7 m is surrounded by a path of width 3.5 m. Find the area of the path. (π = 22/7)

  1. 202 sq.m

  2. 154 sq.m

  3. 192.5 sq.m

  4. 346.5 sq.m

Show answer & explanation

Answer: (C) 192.5 sq.m

Explanation

The outer radius = 7 + 3.5 = 10.5 m. Area of the path = π(10.5² − 7²) = 22/7 × (110.25 − 49) = 22/7 × 61.25 = 192.5 sq m.