Multiple choice

Find the area of sector of circle whose radius is 8.4 cm and angle on the center of circle by arc is 60o. उस वृत्त के वृत्तखंड का क्षेत्रफल ज्ञात कीजिये जिसकी त्रिज्या 8.4 सेमी. है तथा चाप द्वारा केंद्र पर 60o का कोण बनता है।

  1. 18.36 cm2

  2. 13.56 cm2

  3. 14.32 cm2

  4. 36.96 cm2
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Area of sector = (θ/360°) × πr². With θ = 60°, r = 8.4 cm: Area = (60/360) × π × 8.4² = (1/6) × 3.14 × 70.56 = 36.96 cm². Option A (18.36) is exactly half - perhaps if θ was 30° instead of 60°.

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