Answer:
The sides of ∆ABC are 30 units, 40 units, and 60 units long.
The perimeter will be =
units
Given is that ∆ABC and ∆XYZ are similar and the corresponding sides of ∆XYZ are 'r' times as long as the sides of ∆ABC.
So, perimeter of ∆XYZ will be :
units.
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The area of ∆ABC is n square units, so area of ∆XYZ will be :

= 
=
square units.