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PQR is a triangle, whose area is 180 cm^...

PQR is a triangle, whose area is 180 `cm^(2)`. S is a point on side QR, such that PS is the angle bisector of `angleQPR`. If PQ: PR = 2: 3, then what is the area (in `cm^(2)`) triangle PSR?

A

90

B

108

C

144

D

72

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