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
Show answer & explanation
Answer: (A) C
Explanation
Supplementary angles add to 180°: 6y + 70 + 3y + 47 = 180, so 9y = 63 and y = 7.