In a triangle, P ,\ Q\ a n d\ R are the ...

In a triangle, `P ,\ Q\ a n d\ R` are the mid-points of sides `B C ,\ C A\ a n d\ A B` respectively. If `A C=21\ c m ,\ B C=29 c m\ a n d\ A B=30 c m ,` find the perimeter of the quadrilateral `A R P Q`

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