1.
r^3 = r x r x r
Si r = 9,4
r^3 = 9,4 x 9,4 x 9,4 = 830,584
Si r = 11
r^3 = 1331
Si r = 12
r^3 = 1728
2.
Ballon de handball :
4/3 x pi x 830,584 = 3478 cm3
Ballon de football
4/3 x pi x 1334 = 5588 cm3
Ballon de basket-ball
4/3 x pi x 1728 = 7238 cm3
