bantu dong gan plish

4. luas selimut tabung
[tex]= 2\pi {r} t \\ = 2 \times \frac{22}{7} \times 14 \times 30 \\ = 2640[/tex]
luas bola
[tex] = 4\pi {r}^{2} \\ = 4 \times \frac{22}{7} \times 14 \times 14 \\ = 2464[/tex]
total = 5104