ΔABC is similar to ΔDEF is area of ΔABC is 9 sq. cm. and area of ΔDEF is 16

Question

ΔABC is similar to ΔDEF is area of ΔABC is 9 sq. cm. and area of ΔDEF is 16 sq. cm. and BC = 21 cm. Then the length of EF will be:

Options:

A . 5.6 cm

B . 2.8 cm

C . 3.7 cm

D . 1.4 cm

Answer: Option B

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