Jawaban:

1. s=13 dm

volume kubus =s³(sxsxs)

=13 x 13 x 13

=2197 dm³

2. L alas = sxs =s²

s²=196

s=√196

s=14cm

v=14 x14 x14

=2744 cm ³

3. v kubus kecil = 6 x6 x6 = 216

v kubus besar = 9 x9 x9 = 729

216:729 =72:243

disederhanakan lagi perbandingannya

8:27

4. bangun 1 = 2cm x 3x3x5= 90 cm³

bangun 2 = 2cm x 3 x 2 x4 = 48 cm ³

bangun 3= 2cm x 3 x 3 x5 =90cm³

total = 90+90+48=228cm³

rumus volume balok = p x l x t

5. kue 1 = 8x 2 x5 = 80 cm³

kue 2 = 12 x 3 x6 = 216 cm ³

selisih volume = 216-80 = 136 cm³

6. volume tanah yg digali =

0.75 x 1.2 x 2.5 = 2.25 m³

7. v balok = v kubus

p x l x t = s³

27 x9 x24 = s³

³√5832= 18 cm

8. v = ⅓ x luas alas x tinggi

v= ⅓ x π 18² x 30

= 10. 1017.36

= 10173.6 cm ³

9. v tabung = luas alas lingkaran x tinggi

v = πx r² x t

v = 22/7 x 35 x 35 x 25

v = 22 x 5 x35 x 25

= 96250 cm ³