SSC GD Constable previous year question
The cost of painting a spherical vessel of radius 7 cm is ₹18,480. Find the cost of painting per square centimetre (use π = 22/7).
Asked in SSC GD Constable 2025: 11 Feb 2025 Shift 1 (Morning) · Quantitative Aptitude
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Correct answer: (D) ₹30
Surface area of sphere = 4πr² = 4×(22/7)×49 = 616 cm². Rate per cm² = 18480/616 = ₹30.
हिंदी में प्रश्न
7 cm त्रिज्या के एक गोलाकार पात्र को पेंट करने की लागत ₹18,480 है। प्रति वर्ग सेंटीमीटर की दर से पेंट करने की लागत ज्ञात कीजिए। (π = 22/7 का उपयोग कीजिए)
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सही उत्तर: (D) ₹30
गोले का पृष्ठीय क्षेत्रफल = 4πr² = 4×(22/7)×49 = 616 cm²। प्रति cm² दर = 18480/616 = ₹30।
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