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The areas of two similar triangles ∆XYZ and ∆LMN are 49 cm² and 9 cm². respectively. If LM = 9 cm, then the length 4 of XY is:

Question

The areas of two similar triangles ∆XYZ and ∆LMN are 49 cm² and 9 cm². respectively. If LM = 9 cm, then the length 4 of XY is:

A.

14 cm

B.

7 cm

C.

49 cm

D.

21 cm

Solution

Correct option is D

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