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triangleDEF is similar to trianglePQR. I...

`triangleDEF` is similar to `trianglePQR`. If the ratio of perimeter of `triangleDEF` and `trianglePQR` is 4:5 and if PQ = 15 cm, then the length of DE is

A

12 cm

B

10 cm

C

20 cm

D

8 cm

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