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The diagonal of a square A is (a+b) unit...

The diagonal of a square A is (a+b) units. What is the area (in square units) of the square drawn on the diagonal of square B whose area is twice the area of square A?
एक वर्ग A का विकर्ण (a+b) इकाई है | वर्ग B, जिसका क्षेत्रफल वर्ग A के क्षेत्रफल से दोगुना है, उसके विकर्ण पर खींचे गए वर्ग का क्षेत्रफल ( वर्ग इकाई में ) कितना होगा ?

A

`(a+b)^2

B

`2 (a+b)^2

C

`4 (a+b)^2

D

`8 (a+b)^2

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