The angles of a quadrilateral are in the ratio 2 ∶ 5  10. Find the difference between the greatest and the smallest angles of the quadrilateral.

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RRB Group D 25 Aug 2022 Shift 2 Official Paper
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  1. 50°
  2. 120°
  3. 180°
  4. 60°

Answer (Detailed Solution Below)

Option 2 : 120°
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Detailed Solution

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Given:

Ratio of angles of quadrilateral = 2 ∶ 5 ∶ 7 ∶ 10

Concept:

Since, we know that the sum of angles of a quadrilateral is 360°, using this property calculate the values of all the angles of the quadrilateral.

Calculation:

Let, the angles be 2x, 5x, 7x, 10x.

2x + 5x + 7x + 10x = 360° 

⇒ 24x = 360° 

⇒ x = 

⇒ x = 15° 

Largest angle = 10x = 10 × 15° = 150° 

Smallest angle = 2x =2 × 15° = 30° 

Difference between the smallest and the largest angle = 150° - 30° = 120° 

∴ '120°' is the difference between the largest and the smallest angle.

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