bonjour
pi x 0.50² x 4 x 4 = 12.57
volume des 4 colonnes = 12.57 m ³
ciment = 400 x 12.57 = 5 028 kg
sable = 460 x 12.57 = 5 782.2 L
gravillons = 780 x 12.57 = 9 804.6 L
eau = 200 x 12.57 = 2 514 L
bon dimanche
