Tolong dijawab no 17,19,20

17. volume balok = p x l x t.
= 4 x 6 x 10
= 240 cm3
volume kubis = s3
= 6^3
= 216 cm3
volume total = 240 + 216
= 456

19. V = (s3) x 3
= (2^3) x 3
= 8 x 3
= 24 dm3

20. l = v : (p x t)
= 40 : (6 x 5)
= 40 : 30
= 1,33 : 1/3
= 4 dm

jika ada kesalahan mohon maaf sepenuhnya ya !