1 ) Vglace = 21 + 21 * 1/14
= 21 + 21/14
= 21 + 1,5
= 22,5 L
2 ) Vglace = 40 * 50 * 20
= 40000 cm^3
40000 cm^3 = 40 dm^3 = 40 L
Nbre Litres = 40 - 40 * 1/14
= 40 - 40/14
= 40 - 3
= 37 L
