In the given figure if PQ || RS, then the value of x is -

12-5-2025 IMG-1346 Shiwangani Gupta -3

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Rajasthan 3rd Grade Level 1 Official Paper (Held On: 25 Feb, 2023 Shift 1)
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Answer (Detailed Solution Below)

Option 1 : 42
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Detailed Solution

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Given:

PQ || RS (PQ is parallel to RS)

Angle 1 = (3x - 20)°

Angle 2 = (2x - 10)°

Concept Used:

When two parallel lines are intersected by a transversal, the consecutive interior angles are supplementary. This means that the sum of the measures of the consecutive interior angles is 180°.

In the given figure, the angles labeled (3x - 20)° and (2x - 10)° are consecutive interior angles.

Calculation:

According to the concept of consecutive interior angles:

(3x - 20)° + (2x - 10)° = 180°

Combine like terms:

3x + 2x - 20 - 10 = 180

5x - 30 = 180

5x = 180 + 30

5x = 210

x = 210 / 5

x = 42

∴ The value of x is 42.

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