SSC CPO 2019 PYQ — Question 111

SSC CPO Tier I - 12th March 2019 - Shift 2 • Quantitative Aptitude • Q111

In ΔABC, ∠A = 30º, If the bisector of the angle B and angle C meet at a point O in the interior of the triangle, then ∠BOC is equal to:

Show answer & explanation

Correct answer: B

Explanation

The correct answer is Option 2 i.e 105º

∠A = 30º

∠ABC + ∠ACB = 180º - 30º = 150º

⇒ 2∠OBC + 2∠OCB = 150º

⇒ ∠OBC + ∠OCB = 75º

⇒ 180º - ∠BOC = 75º

⇒ ∠BOC = 105º