39. Exemplar exercise problems XII

It is given that  $\Delta ABC \sim \Delta EDF$ such that $AB = 5 \ cm$, $AC = 7 \ cm$, $DF = 15 \ cm$ and $DE = 12 \ cm$. Find the lengths of the remaining sides of the triangles.

 

$EF =$ $cm$

 

$BC =$ $cm$