Jawaban:

2. C. 472 cm²

3. B. 3.240 cm³

4. D. 1.860 cm²

5. A. 15.000 cm³

Penjelasan dengan langkah-langkah:

2. p = 8 cm, l = 7 cm, t = 12 cm

Lp = 2 (pl + pt + lt)

Lp = 2 ((8 × 7) + (8 × 12) + (7 × 12))

Lp = 2 (56 + 96 + 84)

Lp = 2 (236)

Lp = 2 × 236

Lp = 472 cm²

3. p = 15 cm, l = 12 cm, t = 18 cm

V = p × l × t

V = 15 × 12 × 18

V = 180 × 18

V = 3.240 cm³

4. p = 18 cm, l = 15 cm, t = 20 cm

Lp = 2 (pl + pt + lt)

Lp = 2 ((18 × 15) + (18 × 20) + (15 × 20))

Lp = 2 (270 + 360 + 300)

Lp = 2 (930)

Lp = 2 × 930

Lp = 1.860 cm²

5. p = 30 cm, l = 20 cm, t = 25 cm

V = p × l × t

V = 30 × 20 × 25

V = 600 × 25

V = 15.000 cm³