ABCD is a trapezium with AD ∥ BC and AD ...

ABCD is a trapezium with AD ∥ BC and AD = 4cm. If the diagonals AC and BD intersect each other at O such that AO/OC = DO/OB =1/2, then BC =

A

6 cm

B

7 cm

C

8 cm

D

9 cm

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