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Question

If AD is bisector of interior A of a triangle ABC and AB=10cm,AC=6cm,BD=12cm, then CD= ?
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A
8 cm
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B
7.2 cm
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C
10 cm
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D
16 cm
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Solution

The correct option is B 7.2 cm
We have,

ABAC=BDDC106=12CD

CD=12×610=7.2 cm

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