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Question

Find the ratio in which D divides side BC if:
Ar(ΔABD)Ar(ΔADC)=23.

A
4:3
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B
4:5
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C
2:3
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D
1:1
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Solution

The correct option is C 2:3

In ΔABD and ΔADC,
the height is common as it is the perpendicular distance from point A to side BC.
Ar(ABD)Ar(ADC)=(12)(BaseBD)(HeightAE)(12)(BaseDC)(HeightAE)=BDDC=23 i.e. D divides BC in the ratio 2 : 3.

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