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If A is directly proportional to B; B is inversely proportional to C and C is directly proportional to D, then

(a) A is inversely proportional to D
(b) A is directly proportional to D
(c) A is directly proportional to C
(d) A is inversely proportional to C

1. ad
2. b
3. a
4. cd

यदि A, B से सीधे आनुपातिक है; B, C के व्युत्क्रमानुपाती है और C, D के सीधे समानुपाती है

(a) A, D के व्युत्क्रमानुपाती है
(b) A, D के सीधे आनुपातिक है
(c) A, C के सीधे आनुपातिक है
(d) A, C के व्युत्क्रमानुपाती है

1. ad
2. b
3. a
4. cd
This Question came in
UGC-NET-03-December-2019-Shift-2-Q16
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Detailed Explanation & Answer
A is directly proportional to B: A = k₁B (for some constant k₁)
B is inversely proportional to C: B = k₂/C (for some constant k₂)
C is directly proportional to D: C = k₃D (for some constant k₃)
By substituting the second and third relationships into the first, we get:

A = k₁(k₂/C) = k₁k₂/D (since C = k₃D)
Thus, A is inversely proportional to D. This means that as D increases, A decreases, and vice versa.
A, B के समानुपाती है: A = k₁B (कुछ स्थिरांक k₁ के लिए)
B, C के व्युत्क्रमानुपाती है: B = k₂/C (कुछ स्थिरांक k₂ के लिए)
C, D के सीधे आनुपातिक है: C = k₃D (कुछ स्थिरांक k₃ के लिए)
पहले में दूसरे और तीसरे रिश्ते को प्रतिस्थापित करने पर, हमें मिलता है:

A = k₁(k₂/C) = k₁k₂/D (चूंकि C = k₃D)
इस प्रकार, A, D के व्युत्क्रमानुपाती है। इसका मतलब है कि जैसे-जैसे D बढ़ता है, A घटता है, और इसके विपरीत।
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