Tolong dibantu cepat ya

*V. 1/2 bola
1/2 x 4/3 x phi x r^3
1/2 x 4/3 x 3,14 x 9 x 9 x 9
6,28 x 243
1.526,04

*V. Kerucut
1/3 x phi x r^2 x t
1/3 x 22/7 x 7 x 7 x 21
22 x 49
1.078

*Selisih
V. 1/2 bola - V. Kerucut
1.526,04 - 1.078
448,04