bonjour
1 ) 15 * 7 = 105
aire = 105 m²
alimentation = 105 * 13/20 = 68.25 m²
produits hygiène = 105 : 10 = 10.5 m²
produits frais = 105 : 5 = 21 m²
articles de bazar = 1 - ( 13/20 + 1/10 + 1 /5 ) = 20/20 - ( 13/20 + 2/20 + 4/20 )
= 20/20 - 19/20 = 1 /20
= 105 : 20 = 5.25 m²
