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ABCD is a trapezium in which AB||CD and ...

ABCD is a trapezium in which AB||CD and AB=2CD. If its diagonals intersect each other at O, then ratio of areas of trianlges AOB and COD is :

A

(a) `4:1`

B

(b) `1:3`

C

(c) `2:1`

D

(d) `3:1`

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The correct Answer is:
A
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