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S= ∛2.744
Sisi = 14
anggap 2 kubus disusun kedepan-belakang, maka
P = 14 x2 = 28cm
L= 14
T = 14
LP = 2(PL+PT+LT)
= 2( (28(14) + 28(14) + 14(14) )
= 2( 392+392+196)
= 2(980)
= 1.960 ...A