RRB Technician Grade 3 previous year question
The capacity of a cylindrical tank is 55440 cm³. If its base radius is 14 cm, then find the total surface area of the tank. (Use π = 22/7)
Asked in RRB Technician Grade 3 (09 Mar 2026 Shift 1) · Quantitative Aptitude
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Correct answer: (C) 9152 cm²
Volume = πr²h ⇒ 55440 = (22/7)×14²×h ⇒ h = 55440/616 = 90 cm. TSA = 2πr(r+h) = 2×(22/7)×14×(14+90) = 88×104 = 9152 cm².
हिंदी में प्रश्न
किसी बेलनाकार टंकी की धारिता 55440 cm³ है। यदि इसके आधार की त्रिज्या 14 cm है, तो टंकी का संपूर्ण पृष्ठीय क्षेत्रफल ज्ञात कीजिए। (π = 22/7 का उपयोग कीजिए)
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सही उत्तर: (C) 9152 cm²
आयतन = πr²h ⇒ 55440 = (22/7)×14²×h ⇒ h = 90 सेमी। कुल पृष्ठीय क्षेत्रफल = 2πr(r+h) = 2×(22/7)×14×104 = 9152 सेमी².
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