Mathematics

Problem

In two similar triangles

\triangle PQR

and

\triangle XYZ

, the perimeter of

\triangle PQR

18\,\text{cm}

and that of

\triangle XYZ

30\,\text{cm}

. If

PQ = 6\,\text{cm}

corresponds to

XY

, find

XY

. a)

12\,\text{cm}

10\,\text{cm}

9\,\text{cm}

8\,\text{cm}