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In trapezium ABCD. AB||DC and DC = 2AB. ...

In trapezium ABCD. AB||DC and DC = 2AB. A line segment EF drawn parallel to AB cuts AD in F and BC in E such that `(BE)/(EC)=3/4` .
Diagonal DB intersects EF at G. prove that &EF= 10AB.

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The correct Answer is:
`=10AB`
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