RRB Technician Grade 3 previous year question
If the fourth proportional to 2x, 3x, and 12 is y, find y.
Asked in RRB Technician Grade 3 (10 Mar 2026 Shift 2) · Quantitative Aptitude
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Correct answer: (B) 18
The fourth proportional to 2x, 3x, 12 satisfies 2x:3x = 12:y, so y = (3x×12)/(2x) = 18 (the x cancels out).
हिंदी में प्रश्न
यदि 2x, 3x और 12 का चतुर्थानुपाती y है, तो y का मान ज्ञात कीजिए।
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उत्तर और व्याख्या देखें
सही उत्तर: (B) 18
2x, 3x, 12 के चतुर्थानुपाती के लिए 2x:3x = 12:y, अतः y = (3x×12)/(2x) = 18 (x आपस में कट जाता है)।
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