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2.p×l×t=25×18×12=420cm3
3.?
4.1/2×45×30=45×15=675
5.?
= 22/7 × 2 × 28 cm
= 22/7 × 56 cm
= 176 cm
2. V = p × l × t
= 25 cm × 18 cm × 12 cm
= 5400 cm³
3. V = luas alas × tinggi
= 150 cm² × 18 cm = 2700 cm³
4. L = d¹ × d² ÷ 2
= 45 cm × 30 cm ÷ 2
= 675 cm²
5. V = π × r² × tinggi
= 22/7 × 14 cm × 14 cm × 10 cm
= 22/7 × 196 cm × 10 cm
= 22/7 × 1960 cm
= 6160 cm³