Answer:
n = 24
Step-by-step explanation:
Since the triangles are similar then the ratios of corresponding sides are equal, that is
[tex]\frac{XZ}{PR}[/tex] = [tex]\frac{XY}{PQ}[/tex] = [tex]\frac{YZ}{QR}[/tex]
hence
[tex]\frac{30}{n}[/tex] = [tex]\frac{35}{28}[/tex] ( cross- multiply )
35n = 30 × 28 = 840 ( divide both sides by 35 )
n = [tex]\frac{840}{35}[/tex] = 24
