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r = 4 cm
luas kubus = 6 x r²
= 6 x 4 x 4
= 96 cm² (A)
semoga membantu ya :)
s√3 = 4√3
s = 4 cm
jadi, Lp kubus = 6.s²
= 6.4²
= 6.16 = 96 cm² ....(A)