1) 14 - 2 = 12
12÷ 4 = 3
4 + 1 = 5
P = 4 * 5 = 20
2) 2 + 4 + 5 = 11
1100000 ÷ 11 = 100000
2 * 100000 = 200000
4 * 100000 = 400000
5 * 100000 = 500000
3) 2/2 =1
450 cm = 4,5 m
Pk = π 1²m = πm ≈ 3,14 m²
3,14m² * 4,5m = 14,13m³
14,13m³ * 3 = 42,38m³
45 dm = 4,5 m
P = 4,5m * 3,14m = 14,13m²
42,38m³/14,13m² = 3m
odp. zbiornik ma głębokość 3