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Railways PYQCBT 2 2017

RRB NTPC · Question 113

Find the area of a triangle whose sides are 5 cm, 12 cm and 13 cm.

  1. 46 sq. cm

  2. 42 sq. cm

  3. 30 sq. cm

  4. 38 sq. cm

Show answer & explanation

Answer: (C) 30 sq. cm

Explanation

5² + 12² = 13², so this is a right triangle with legs 5 and 12. Area = ½ × 5 × 12 = 30 sq cm.