DRDO Multi tasking staff Model paper 10

Tips & Tricks
Since the angles of the triangle are in the ratio 5 : 3 : 10.
Let the common factor be x
We know Sum of all angles of a triangle = 180°
∴ 5x + 3x + 10x = 180°
⇒ 18x = 180°
∴ x = 10°
Largest angle = 10 × 10 = 100°
Smallest angle = 3 × 10 = 30°
Difference = 100° - 30° = 70°