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किसी सम चतुर्भुज के विकर्ण 8 cm तथा 65 cm है। उसके बराबर भुजा वाले वर्ग का क्षेत्रफल ज्ञात करें?
A. 25
B. 55
C. 64
D. 36

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Correct Answer - A
In a rhombus
`4a^(2)=d_(1)^(2)+d_(2)^(2)`
`4a^(2)+8^(2)+6^(2)`
`a^(2)=100/4=25`
`implies` Side of square `=5cm`
`:.` Area of `25cm^(2)`

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