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Railways PYQCBT 1 2016

RRB NTPC · Question 73

One angle of a triangle is 55 If the other two angles are in the ratio 9 : 16, find the angles? A. 65 and 115 B. 90 and 160 C. 55 and 165 D. 45 and 80

  1. B

  2. C

  3. A

  4. D

Show answer & explanation

Answer: (D) D

Explanation

The angles of a triangle add up to 180°, so the other two angles total 180 − 55 = 125°. Divide 125 in the ratio 9 : 16: 125 × 9/25 = 45° and 125 × 16/25 = 80°.