RRB NTPC Mains or Stage 2 Model Paper 7 with solutions

(c) The smallest angle of the triangle is half of the largest angle.
∴Ratio of the three angle = 4 : 3 : 2
∴4x + 3x + 2x = 180°
∴ 9x = 180°
∴x = 20°
∴required difference = 4x – 2x
= 2x = 2 × 20° = 40°