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Railways PYQCBT 1 2016

RRB NTPC · Question 66

What is the area of the square, if the length of its diagonal is 13√2 units? A. 104 sq. units B. 169 sq. units C. 3387 sq. units D. 676 sq. units

  1. B

  2. C

  3. D

  4. A

Show answer & explanation

Answer: (A) B

Explanation

The diagonal of a square = side × √2, so side = 13√2 / √2 = 13 units. Area = 13² = 169 sq. units (equivalently, area = diagonal²/2 = 338/2 = 169).