In $$\triangle PQR$$, points T and S are on PQ and PR, respectively, such that TS is parallel to QR. If TQ = 7.2 cm, PS = 1.8 cm and SR = 5.4 cm, then find the length of PT.

A

2 cm

B

2.4 cm

C

1.35 cm

D

3.6 cm