2. Find the area of the similar triangle

The triangles \(PQR\) and \(DEF\) are similar. If \(PQ\) \(=\) 11 \(cm\), \(DE\) \(=\) 14 \(cm\) and \(ar(\triangle DEF)\) \(=\) 392 \(cm^2\), then find \(ar(\triangle PQR)\).

 

Answer:

 

Area of triangle \(PQR =\)  \(cm^2\).