Question Details

The length of each side of an equilateral triangle ABC is 3 cm. Let D be a point on BC such that the area of triangle ADC is half the area of triangle ABD. Then the length of AD, in cm, is

Options

A

$\sqrt{7}$

B

$\sqrt{8}$

C

$\sqrt{6}$

D

$\sqrt{5}$

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