volume pyramide = ( aire base x h ) / 3
336 = ( aire base * 7 ) / 3
7 x /3 = 336
7 x /3 = 112 /3
7 x = 112
x = 16
aire base = 16 m²
207 = ( 36 h ) / 3
36 h /3 = 621/3
h = 17.25
hauteur = 17.25 cm
