∠A + $$\frac{1}{2}$$ ∠B + ∠C = 140°, then ∠B is :

A. 50°

B. 80°

C. 40°

D. 60°

Answer: Option B

Solution(By Examveda Team)

According to question,
∠A + $$\frac{1}{2}$$ ∠B + ∠C = 140° . . . . . . . . (i)
As we know that
∠A + ∠B + ∠C = 180° . . . . . . . . . (ii)
Compare equation (i) and (ii)
$$\frac{1}{2}$$ ∠B = 40°
∴ ∠B = 80°