Bonsoir,
1)
a) 2/3 × π × (1,5/2)² × 4,2 = 1,575π = 4,948... ≅ 4,95
b) 1,575π cm³ ÷ 1,98 cm³/mn ≅ 2,5 mn ≅ 2 mn 30 s
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Bonsoir,
1)
a) 2/3 × π × (1,5/2)² × 4,2 = 1,575π = 4,948... ≅ 4,95
b) 1,575π cm³ ÷ 1,98 cm³/mn ≅ 2,5 mn ≅ 2 mn 30 s