tolong batuin, pake cara ya

29). Lpermukaan
=(2× 12 × 8 ) +(2×12×6) +(2×8×6)
=192 + 144 + 96
=432cm²

30).V = La × t
V = 314cm² × 15cm
V =4710cm³

no 29 . rumus = 2×(pl+pt+lt)
cara = 2×((6×8)+(12×6)+(12×8))
= 2×(48+72+96)
= 2× 216 atau 216 ×2
= 432 cm
jawaban = b. 432 cm