tolong jawab plis......

nomor 1 = Volum balok= P×L×T
= 80cm×40cm×50cm
=160.000cm3

nomor 2 = Volume kubus = S×S×S
=30cm×40cm×20cm
=24.000cm

nomor 3=

volume prisma = luas alas ×tinggi
= (a×t÷2) × t prisma
= (30cm×40cm÷2)×20cm
= 1.200÷2×20cm
= 600×20cm = 12.000cm3

nomor 4 =
volume prisma = luas alas ×tinggi
= (a×t÷2)×t prisma
= (40cm×60cm÷2)×80cm
=2.400÷2×80cm
=96.000cm3