Bonjour
V = 4/3 x Pi x r^3
‘V : volume
R : rayon
rayon de la boule :
2 cm
Volume :
V = 4/3 x pi x 2^3
V = 32/3 x pi cm^3
rayon de la boule :
25 cm
Volume :
V = 4/3 x pi x 25^3
V = 4/3 x pi x 15625
V = 62500/3 x pi cm^3
V = 62,5/3 x pi Litres
rayon de la boule :
V = 4/3 x pi x r^3
r^3 = V/pi x 3/4
r = racine cubique (108/3 x pi/pi x 3/4)
R = racine cubique (108/4)
R = racine cubique 27
R = 3 cm
volume : 108/3 x pi cm^3
rayon de la boule :
V = 4/3 x pi x r^3
36 x pi = 4/3 x pi x r^3
r^3 = 36 x 3/4 x pi/pi
R^3 = 27
R = 3 dm
R = 30 cm
volume : 36pi Litres = 36pi dm^3
