Bantu dong gan plish

Bantu dong gan plish

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