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In triangle PQR ,angle Q= 85^@ and angle...

In `triangle PQR` ,`angle Q= 85^@` and `angle R= 65^@`. Points S and T are on the sides PQ and PR, respectively such that `angle STR = 95^@`, then the ratio of QR and ST is 9:5. If PQ=21.6 cm, then the length of PT is:
`triangle PQR में, `angle Q= 85^@` तथा `angle R= 65^@` है | बिंदु S तथा T क्रमशः भुजाओं PQ और PR पर इस तरह स्थित है कि `angle STR = 95^@` है | QR तथा ST का अनुपात 9 : 5 है | यदि PQ =21.6 सेमी है, तो PT की लंबाई ज्ञात करें |

A

10.5 cm

B

9.6 cm

C

12 cm

D

9 cm

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