1) 27 cm^2; 50 ml; 27 +-1 cm^2; 10
2) 17 cm^2; 20 ml; 17 +-0,5; 2
3) 45 cm^2; 100 ml; 45 +-5; 20
4) 52 cm^2; 60 ml; 52 +-2; 10
