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In a `triangle ABC`, DE is parallel to BC, AD = 3 cm, AE = 4cm and AC = 10 cm, then the value of BD in centimetres, is:
`triangle ABC` में, DE, BC & समानांतर है, AD = 3 cm, AE= 4cm और AC = 10 cm, फिर BD (सेंटीमीटर में) मान है:

A

3.5

B

7.5

C

4.5

D

5.5

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