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8 x 11 x 11 = 968
L.Permukaan = 968 cm²
p = 8 cm
l = 11 cm
Dijawab :
L.Permukaan = 2(pl +pt +lt)
968 = 2{(8 . 11) +(8 . t) +(11 . t)}
968 = 2{88 +8t +11t}
968 = 176 +16t +22t
968 = 176 +38t
968 -176 = 38t
792 = 38t
t = 792/38
t = 20,84 cm
Tidak ada jawabannya.