Jawabanmu

2014-04-13T21:05:44+07:00
Misal p = 3x 
l = 2x 
t = x 

 L. per. balok = 2 (pl + lt + pt) 

352 = 2({3x . 2x} + {2x . x} + {3x . x}) 
352 = 2(6x^2 + 2x^2 + 3x^2) 
352 = 2 . 11x^2 
352 = 22x^2 
x^2 = 352/22 
x^2 = 16
x = 4 

jadi t = x
      t = 4 cm