SSC GD Constable previous year question
Find the surface area (in cm²) of a sphere whose diameter is 21 cm.
Asked in SSC GD Constable 2025: 06 Feb 2025 Shift 2 (Afternoon) · Quantitative Aptitude
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Correct answer: (B) 1386
Surface area = 4πr² = 4 × (22/7) × 10.5² = 1386 cm² (radius = 10.5 cm).
हिंदी में प्रश्न
एक गोले का पृष्ठीय क्षेत्रफल (cm² में) ज्ञात कीजिए जिसका व्यास 21 cm है।
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सही उत्तर: (B) 1386
पृष्ठीय क्षेत्रफल = 4πr² = 4 × (22/7) × 10.5² = 1386 cm² (त्रिज्या = 10.5 cm)।
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