tolong jawab siapa saja mohon help me please

2.a
V: 1/3.22/7.7².20
1/3.22/7.49.20
1/3.154.20
1026.67 cm³
b
V:1/3.3,14.10².18
1/3.314.18
6.314
1884 cm³
c
V:1/3.3,14.10,5².24
1/3.3,14.110,25.24
1/3.346,185.24
8.346,185
2769,48 cm³