Mohon dijawab nomor 8 & 9 pliss​

Nomor 8
Lp. setengah bola=2×π×r^3
2×22/7×7×7×7=
2×22×7×7=44×49=2156 cm
Lp.tabung tanpa selimut=
π×r^2+2×π×r×t
22/7×7×7+2×22/7×7×10=
22×7+2×22×10=
154+44×10=
154+440=594 cm
jadi Lp bangun ruang gabungan adalah 594+2156=2750 cm^3
V.bola:4/3πr^2
4/3×22/7×14×14=
4/3×22×2×14=
4/3×44×14=
4/3×616=
821,333
V.tabung:πr^2t
22/7×14×14×12=
22×2×168=
44×168=
7392 cm
V.bangun ruang gabungan
7392+821,333=8213,333 cm