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Let ABCD be a quadrilateral. Let the dia...

Let ABCD be a quadrilateral. Let the diagonals AC and BD meet at O. Let the perpendicular drawn from A to CD meet CD at E. Further, `AO:OC=BO:OD`, AB = 30 cm, CD = 40 cm and the area of the quadrilateral ABCD is 1050 `"cm"^(2)`.
What is BE equal to?

A

30 cm

B

`30sqrt(2)` cm

C

`30sqrt(3)` cm

D

None of the above

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