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Question

In the given figure, ADBECF and AB=BC. The ratio of BE:(AD+CF)=


A

2:1

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B

1:2

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C

3:1

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D

1:1

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Solution

The correct option is B

1:2




(i)Join DC to meet EB at P
InACD
(ii) B is mid point of AC (given)
BPAD (given)
(iii) P is mid point of DC (Converse of mid point theorem)
(iv) Also BP=12AD (mid-point theorem)
In DCF
(v) P is mid-point of DC (from (iii))
(vi) PECF (given)
(vii) E is mid-point of DF(Converse of mid-point theorem)
(viii) PE=12CF (mid-point theorem)
(ix) BE=BP+PE
BE=12AD++12CF
BE=12(AD+CF)
BEAD+CF=12
BE:(AD+CF)=1:2
Hence (B)


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