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p*t = 45cm^2
p*l=54cm^2
l*t=30cm^2
LSP = 2*45 + 2*54 +2*30 = 258cm^2
Volume
p.t = 45
l.t=30
t=30/l
p.l=54
l=54/p
p.t=45
p.(30/(54/p))=45
p^2=81
p=9
p.t = 45
9.t=45
t=5
l.t=30
l.5=30
l=6
maka Volum = p.l.t
= 9*5*6
=270cm^3