RRB Technician Grade 3 previous year question
The curved surface area of a right circular cylinder is 1056 cm² and its height is 16 cm. Find the total surface area of the cylinder. (Use π = 22/7)
Asked in RRB Technician Grade 3 (09 Mar 2026 Shift 3) · Quantitative Aptitude
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Correct answer: (B) 1749 cm2
From CSA=2πrh: r=1056/(2×22/7×16)=10.5 cm. TSA=2πr(r+h)=2×(22/7)×10.5×26.5=1749 cm².
हिंदी में प्रश्न
किसी लंब वृत्तीय बेलन का वक्र पृष्ठीय क्षेत्रफल 1056 cm² है और इसकी ऊँचाई 16 cm है। बेलन का संपूर्ण पृष्ठीय क्षेत्रफल ज्ञात कीजिए। (π = 22/7 का उपयोग कीजिए)
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सही उत्तर: (B) 1749 cm2
CSA=2πrh से: r=1056/(2×22/7×16)=10.5 cm। TSA=2πr(r+h)=2×(22/7)×10.5×26.5=1749 cm²।
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