If area of similar triangles Δ ABC and Δ DEF be

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If area of similar triangles Δ ABC and Δ DEF be 64 sq cm and 121 sq cm and EF = 15.4 cm then BC equals:

[IB Security 2019 With Answers]

A

8 cm

B

18 cm

C

11.2 cm

D

8.2 cm