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1. a. p = 6, l = 4, t = 3
V = p.l.t
V = 6.4.3
V = 72 cm³
b. p = 10, l = 6, t = 4
V = 10.6.4
V = 240 cm³
2. a.V = 7.3.5 = 105 cm³
b. V = 12.4.6 = 288 cm³
4. V = V balok 1 + V balok 2
= 100.30.50 + 100.90.40
= 100(30.50+90.40)
= 100.100(3.5+9.4)
= 10000.3(5+3.4)
= 30000(5+12)
= 30000(17)
V = 510000 cm³ = 510 m³