Jawaban:

1. - Luas alas balok = p x l = 7 x 4 = 28 cm²

- volume blok = p x l x t = 7 x 4 x 3 = 84cm

2. - Luas alas balok = 10 x 6 = 60 cm²

- volume balok = 10 x 6 x 2 = 120 cm³

3. - Luas alas balok = 12 x 8 = 96 cm²

- volume balok = 12 x 8 x 4 = 402 cm³

4. - Luas alas balok = 9 x 5 = 45 dm²

- volume balok = p x l x t

90 = 9 x 5 x t

90 = 45 t

t = 90/45

t = 2 dm

5. - Luas alas balok = 8 x 5 = 40 dm²

- volume balok = p x l x t

240 = 8 x 5 x t

240 = 40 t

t = 240/40

t = 6 dm

6. - volume balok = p x l x t

540 = 18 x l x 3

540 = 54 l

l = 540/54

l = 10 dm

- luas alas balok = p x l = 18 x 10 = 180dm²

7. - luas alas balok = p x l

60 = 12 x l

l = 60/12

l = 5 m

- volume balok = 12 x 5 x 4 = 240 m³

8. - luas alas balok = p x l

120 = 16 x l

l = 120/16

l = 7,5 m

- volume balok = 16 x 7,5 x 5 = 600 m³

9. - volume balok = p x l x t

960 = p x 8 x 10

960 = 80 p

p = 960/80

p = 12 m

- luas alas balok = 12 x 8 = 96 m²

10. - volume balok = p x l x t

720 = p x 6 x 8

720 = 48 p

p = 720/48

p = 15 m

- luas alas balok = 15 x 6 = 90 m²

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