RRB Technician Grade 3 practice question
If A : B = 5 : 9, B : C = 5 : 6, C : D = 3 : 2 and A + B + C + D = 1,600, then the value of D is:
From a RRB Technician Grade 3 Quantitative Aptitude practice set · Quantitative Aptitude
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Correct answer: (B) 360
Make B and C common: A : B : C : D = (5×5×3) : (9×5×3) : (9×6×3) : (9×6×2) = 75 : 135 : 162 : 108 = 25 : 45 : 54 : 36. Sum of parts = 160, so one part = 1,600/160 = 10. D = 36 × 10 = 360.
हिंदी में प्रश्न
यदि A : B = 5 : 9, B : C = 5 : 6, C : D = 3 : 2 और A + B + C + D = 1,600 हो, तो D का मान है:
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सही उत्तर: (B) 360
B और C को उभयनिष्ठ बनाएँ: A : B : C : D = (5×5×3) : (9×5×3) : (9×6×3) : (9×6×2) = 75 : 135 : 162 : 108 = 25 : 45 : 54 : 36। भागों का योग = 160, अतः एक भाग = 1,600/160 = 10। D = 36 × 10 = 360।
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