RRB NTPC CBT-1 previous year questionFind the volume of a cylinder whose height is 21 cm and its radius is of the radius of another cylinder with a volume of 317900 cm3 and a height of 14 cm. (Use π = 22/7)
Find the volume of a cylinder whose height is 21 cm and its radius is of the radius of another cylinder with a volume of 317900 cm3 and a height of 14 cm. (Use π = 22/7) 
Asked in RRB NTPC 2026 — 16 June Shift 2 · Quantitative Aptitude
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Correct answer: (C) 171660 cm3
The other cylinder has r2 = V/(pi*h) = 317900/(22/7*14) = 7225, so r2=85 cm; using radius = 3/5 of 85 = 51 cm and height 21 cm gives volume = 22/7*512*21 = 171660 cm3.
हिंदी में प्रश्न
उस बेलन का आयतन ज्ञात कीजिए जिसकी ऊँचाई 21 cm और saat FSM, 317900 cm? आयतन और 14 ऊंचाइ वाले एक अन्य बैलन का त्रिज्या का --- है। ता = 22 का उपयोग कीजिए) 
उत्तर जाँचने के लिए किसी विकल्प पर टैप करें।
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सही उत्तर: (C) 171660 cm®
दूसरे बेलन में r2 = V/(pi*h) = 317900/(22/7*14) = 7225, अतः r2=85 सेमी; त्रिज्या = 85 का 3/5 = 51 सेमी और ऊंचाई 21 सेमी लेने पर आयतन = 22/7*512*21 = 171660 सेमी3 प्राप्त होता है।
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