दो संख्याओं में 5 का अंतर है। यदि उनका गुणनफल 336 है, तो दोनों संख्याओं का योग क्या है?

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WEBCSC 05/2021 Common Official Paper (Morning Shift)
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  1. 21
  2. 28
  3. 37
  4. 51

Answer (Detailed Solution Below)

Option 3 : 37
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दिया गया है:

x - y = 5

xy = 336

प्रयुक्त सूत्र:

(x + y)2 = (x - y)2 + 4xy

गणना:

मान लीजिए x और y दो संख्याएँ हैं।

(x + y)2 = (x - y)2 + 4xy

⇒ (x + y)2 = 52 + 4 × 336

⇒ (x + y)2 = 25 + 1344

⇒ (x + y)2 = 1369

⇒ (x + y) = √1369 = 37

इस प्रकार, दो संख्याओं का योग = 37

∴ सही उत्तर विकल्प (3) है।

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