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Question

The following figure has centroid at the point O

If AO = 6 cm , find the length of OR.


A

2 cm

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B

5 cm

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C

3 cm

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D

12 cm

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Solution

The correct option is C

3 cm


O is the centroid

The centroid divides median in the ratio 2 : 1

AO : OR = 2 : 1

AO = 2x and OR = x

AO = 2x = 6 cm

x = 3 cm which is the length of OR


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