∆ABC is similar to $$\triangle$$ PQR. The area of $$\triangle$$ ABC is 64 $$cm^{2}$$ , and the area of $$\triangle$$ PQR is 121 $$cm^{2}$$ .If QR=15.4 cm, what is the length of BC?

A

13.2 cm

B

15.4 cm

C

11.2 cm

D

12.3 cm