alleryایک نصف کرہ دار گنبد کا رداس 7 cm ہوتا ہے۔ اس کے مڑے ہوئے غلاف کو کتنے مواد کی ضرورت ہے؟ π = 22/7 استعمال کریں۔
A308 cm²
B154 cm²
C462 cm²
D616 cm²
Answer & Solution
Correct answer: A. 308 cm²
ایک نصف کرہ کا خم دار رقبہ 2πr² = 2 × (22/7) × 49 = 308 cm² ہے۔
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