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= 55 x 8
= 440 cm²
2. 3,25 ha = 32500 m²
2,7 are = 270 m²
25 ca = 25 m²
32500 + 270 + 25 = 32795 m²
3. 20² = 400
16² = 256
400 - 256 = √144 = 12
4. 22/7 x 35/2 x 35/2 = 962,5 cm²
5. 40 x 24 x 1/2 = 480 cm²
6. 40 x 30 x 25 = 30.000 cm³ = 30 liter
7. 26 x 30 x 1/2 = 390 cm²
8. √64 = 8 cm
9. 3,14 x 20 x 20 = 1256 cm²
10. 33.750 : 1.350 = 25 cm