Jawaban:

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

volume balok = p x l x t = 7 x 4 x 3 = 84 cm³

2. Luas alas balok = p x l = 10 x 6 = 60 cm²

volume balok = p x l x t = 10 x 6 x 2 = 120 cm³

3. Luas alas balok = p x l = 12 x 8 = 96 cm²

volume balok = p x l x t = 12 x 8 x 4 = 384 cm³

4. tinggi = volume : luas alas = 90 : 45 = 2 dm

luas alas balok = p x l = 9 x 5= 45 dm²

5. tinggi = volume : luas alas = 240 : 40 = 6 dm

luas alas balok = p x l = 8 x 5 = 40 cm²

6. lebar = luas alas : p = 180 : 18 = 10 dm

luas alas balok = volume : tinggi = 540 : 3 = 180 dm²

7. lebar = luas alas : p = 60 : 12 = 5 m

volume balok = luas alas x tinggi = 60 x 4 = 240 m³

8. lebar = luas alas : p = 120 : 16 = 7,5 m

volume balok = luas alas x tinggi = 120 x 5 = 600 m³

9. Luas alas balok = 960 : 10 = 96 m²

panjang = 96 : 8 = 12 m

10. Luas alas balok = 720 : 8 = 90 m²

panjang = 90 : 6 = 15 m

semoga membantu

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