RRB Technician Grade 3 previous year question
If the surface area of a sphere is 314 cm², find its radius. (Take π = 3.14)
Asked in RRB Technician Grade 3 (06 Mar 2026 Shift 1) · Quantitative Aptitude
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Correct answer: (D) 5 cm
Surface area of a sphere = 4*pi*r2 = 314 with pi=3.14 gives r2=314/12.56=25, so r=5 cm.
हिंदी में प्रश्न
314 cm² पृष्ठीय क्षेत्रफल वाले किसी गोले की त्रिज्या ज्ञात कीजिए। (π = 3.14 लीजिए)
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सही उत्तर: (D) 5 cm
गोले का पृष्ठीय क्षेत्रफल = 4πr² = 314, π=3.14 से r²=314/12.56=25, अतः r=5 सेमी।
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