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दो धनात्मक संख्याओें का अंतर 3 हैं यदि उनके वर्गों का योग 369 है। तब संख्याओं का योग ज्ञात करें।
A. 81
B. 33
C. 27
D. 25

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Correct Answer - C
माना दो संख्यऐं इस प्रकार है `a` and `b(agtb)`
According to Question
`a-b=3`
`a^(2)+b^(2)=369`
`implies(a-b)=3`
दोनों तरफ वर्ग करने पर
`(a-b)^(2)-2ab=9`
`369 -2ab=9`
`-2ab=-360`
`2ab=360`
`implies (a+b)^(2)=(a^(2)+b^(2))+2ab`
`=369+360`
`=729`
`a+b=sqrt(729)=27`

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