Railways PYQCBT 1 2016

RRB NTPC · Question 55

If (6y + 70)° and (3y + 47)° are supplementary angles, find the value of y. A. 12 B. 15 C. 7 D. 10

  1. C

  2. A

  3. B

  4. D

Show answer & explanation

Answer: (A) C

Explanation

Supplementary angles add to 180°: 6y + 70 + 3y + 47 = 180, so 9y = 63 and y = 7.