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= 1/3 x L.alas x t.limas
= 1/3 x ( s x s ) x t.limas
= 1/3 x ( 12 x 12 ) x 10
= 1/3 x 144 x 10
=
= 12 x 12
= 144 cm2
Lp = luas alas + jlh sisi tegak
384 cm = 144 cm2 + (1/2 x a x t )
384 cm = 144 cm2 + ( 1/2 x 12 xt )
384 cm = 144 cm2 + ( 6 x t )
6.t = 384 cm - 144 cm
6.t = 240 cm
t = 240 cm / 6
t = 40 cm
V = 1/3 x a x t
= 1/3 x 12 x 40
= 1/3 x 480
= 160 cm3