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In the triangle PQR, C is the centroid. ...

In the triangle PQR, C is the centroid. PQ = 30 cm, QR = 36 cm and PR = 50 cm. If D si the midpoint of QR, then what is the length (in cm) of CD?

A

`(4sqrt(86))//3`

B

`(2sqrt(86))//3`

C

`(5sqrt(86))//3`

D

`(5sqrt(86))//2`

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