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The given figure shows triangle ABC . D ...

The given figure shows triangle ABC . D and E are points on side AB and AC respectively such that `(AD)/(AB)=(AE)/(AC)=1/(3)`.

What is the are of quadrilateral BDEC?

A

60 `"unit"^(2)`

B

90 `"unit"^(2)`

C

160 `"unit"^(2)`

D

180 `"unit"^(2)`

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