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AOBD is a quadrilateral in which angleAO...

AOBD is a quadrilateral in which `angleAOB=angleABD=90^(@) and angleDAB=60^(@)`. If OA = 3 cm, OB = 4 cm then what is the area of quadrilateral AOBD.

A

`6+(5)/(2sqrt(3))cm^(2)`

B

`6+(25sqrt(3))/(2)cm^(2)`

C

`6+sqrt(3)cm^(2)`

D

`6+25sqrt(3)cm^(2)`

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