Answer:
1,111 cm cubed
Hope it helps!
Step-by-step explanation:
1.02 (radius) cubed x 3.14 x 4/3 (sphere volume formula)
=4.44292416 cm cubed
4.44292416 x 250 (magnets amount) = 1,110.73104
1,110.73104 rounded to nearest whole cubic unit
1,111 cm cubed