Question 200999
Remember  that  in  similar  figures,  sides  are  proportion  by Scale  Factor.
.
Lengths  and  perimeter  are  proportional  to SF^1
.
Areas  to  SF^2
.
and  Volumes  to  SF^3
.
In  this  case  ,,,SF^3 = 64 / 27 ,,,SF = 1 1/3
.
LA larger = (1 1/3)^2 * LA smaller
.
LA = (1 1/3)^2 * 18 = 32
.
Check,,,,SF^2 = 32/18 = 1.777,,,,SF =1 1/3,,,,ok